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© 2013 - 2016 Myrddyn Phillips and Aled Williams. Non-commercial copying is permitted provided attribution is preserved. Re-use of the presented data in this or another format requires the permission of the authors.
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Contains OS Data © Crown copyright and database rights 2016, licensed under the OGL (see at http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/ ).
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Y Pellennig - Remotest Hills of Wales - Mainland Wales
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RankNameRemoteness (km)Summit Grid ReferenceSummit Grid Reference extracted from1:50,000 Map1:25,000 mapSummit Height (m)Drop (m)Region & Sub-RegionGroupGrid Reference (Nearest Paved Public Road)Bwlch Grid ReferenceBwlch Grid Reference extracted fromBwlch Height (m)Notes
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1Tyle Garw4.875SN 78499 17819Trimble GeoXH 600016012467.341.7South Wales B5Mynydd DuSN 78492 12918SN 78703 17366 & SN 78703 17363LIDAR425.6Numerical Data: 467.3m summit height from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips and assisted by Mark Trengove and 425.6m bwlch height (41.7m drop) from LIDAR analysis conducted by Myrddyn Phillips, with LIDAR giving two positions of equal height for the bwlch.
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2Foel Uchaf4.850SN 80667 62250LIDAR147187, 200473.9530.7South Wales B1Drygarn FawrSN 77033 65470SN 80536 62392LIDAR443.2Place Name Information: Foel Uchaf is the prioritised locally known name for this hill. Foel Uchaf and Foel Isaf (SN 803 614) are also locally known by the collective names of Moelydd and Foel Moel Prysgau. Numerical Data: 473.95m summit height and 443.2m bwlch height (30.7m drop) from LIDAR analysis conducted by Myrddyn Phillips
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3Cerrig Coegion4.750SN 79087 17673Trimble GeoXH 600016012473.457.9South Wales B5Mynydd DuSN 78492 12918SN 79544 18696 & SN 79547 18693 & SN 79549 18689LIDAR415.4Place Name Information: Cerrig Coegion is the locally known name for this hill. Name taken from a non-Ordnance Survey source. The name is also recorded in 'Bugail Y Mynydd Du' by Rhys Davies. Numerical Data: 473.4m summit height from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips and assisted by Mark Trengove and 415.4m bwlch height (57.9m drop) from LIDAR analysis conducted by Myrddyn Phillips, with LIDAR giving three positions of equal height for the bwlch. Triangulation pillar with 471.830m flush bracket height situated on the summit area at SN 79067 17418.
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4Esgair y Llyn4.535SN 841 701
135, 136, 147
200528.615.631CCarn yr HyrddodSN 88586 69399SN 838 700513.0528.6m summit height and 513.0m bwlch height (15.6m drop) from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips and Aled Williams, with both positions based on LIDAR analysis conducted by Aled Williams.
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5Carnedd Uchaf4.52SH 686 66811517925.033.030BCarnedd LlywelynSH 73190 66331SH 691 673892.0Carnedd Gwenllian was accepted by the Ordnance Survey as an official name for this summit on the 26th September 2009. This name originates as an invented name coined by Cymdeithas y Dywysoges Gwenllian and as such, has received a mixed reception among the local farming community. Thomas Pennant recorded the name of this hill as Carnedd y Lladron in 1781, which is substantiated by an 1848 Tithe map. However, Carnedd Uchaf is currently the name in local use. 925.0m summit height from a Leica RX1250 survey conducted by Alan Dawson and 892.0m bwlch height (33.0m drop) from LIDAR analysis conducted by Aled Williams.
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6Cnapyn Drawsffos4.51SN 834 706
135, 136, 147
200* 548.04631CCarn yr HyrddodSN 83196 75149SN 831 713502548.0m summit height from LIDAR analysis conducted by Aled Williams. Drop value ascertained from a 21.6m basic levelling survey conducted from the critical bwlch for this hill at SN 831 713 to the 524m summit of Trum y Gŵr at SN 830 718.
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7Foel Grach4.35SH 688 65911517975.441.830BCarnedd LlywelynSH 73190 66331SH 688 652933.7975.4m summit height from a Leica RX1250 survey conducted by Alan Dawson and 933.7m bwlch height (41.8m drop) from LIDAR analysis conducted by Aled Williams. Emergency mountain refuge situated just below the summit.
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8Foel Ganol4.3SN 809 916135, 136214, 215548c2631APumlumon FawrSN 80076 95840SN 808 918c522Foel Ganol is the locally known name for this hill. The Ordnance Survey have incorrectly applied the name Foel Isaf to this hill.
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9Foel Isaf4.26SN 802 912135, 136214, 215565c3431APumlumon FawrSN 77500 87966SN 792 910c531Foel Isaf is the locally known name for this hill. The Ordnance Survey have incorrectly applied the name Foel Uchaf to this hill, having previously recorded Moel Palurau [sic] as the name. Recorded as Moel y Delyn on a 1744 map entitled 'A Plan of the Mannor of Perveth'.
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10Esgair Garthen4.26SN 825 642147187, 200508.122.731CDrygarn FawrSN 86717 63600SN 823 639485.35508.1m summit height and 485.35m bwlch height (22.7m drop) from a Trimble GeoXH 6000 summit survey and LIDAR bwlch analysis conducted by Aled Williams and Myrddyn Phillips.
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11Llethr Gwaered4.225SN 80153 62593 & SN 80155 62598LIDAR147187, 200489.415.0South Wales B1Drygarn FawrSN 77033 65470SN 79707 62542LIDAR474.4Place Name Information: Llethr Gwaered is a locally known name for this hill. Numerical Data: 489.4m summit height and 474.4m bwlch height (15.0m drop) from LIDAR analysis conducted by Myrddyn Phillips, with LIDAR giving two positions of equal height for the summit.
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12Blaen Rhestr4.2SN 843 693
135, 136, 147
200547c3931CCarn yr HyrddodSN 88582 69378SN 837 689c508Roofed and locked building situated south-westward of the summit.
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13Foel Isaf4.075SN 80362 61452LIDAR147187, 200471.237.8South Wales B1Drygarn FawrSN 79297 57549SN 80376 61825 & SN 80379 61826LIDAR433.4Place Name Information: Foel Isaf is the prioritised locally known name for this hill. Foel Uchaf (SN 806 622) and Foel Isaf are also locally known by the collective names of Moelydd and Foel Moel Prysgau. Numerical Data: 471.2m summit height and 433.4m bwlch height (37.8m drop) from LIDAR analysis conducted by Myrddyn Phillips, with LIDAR giving two positions of equal height for the bwlch.
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14Foel Fras3.975SH 696 68111517944.162.830BCarnedd LlywelynSH 73190 66331SH 687 665881.3944.1m summit height and 881.3m bwlch height (62.8m drop) from a Leica RX1250 survey conducted by Alan Dawson. Triangulation pillar with 943.051m flush bracket height situated on the summit area at SH 69652 68173.
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15Carnedd Llywelyn3.95SH 683 643115171062.1748.330BCarnedd LlywelynSH 67752 60472SH 675 604313.7Name composition in accordance with standard modern Welsh and upland place-name principles. 1062.1m summit height from LIDAR analysis conducted by Aled Williams and 313.7m bwlch height from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips with the position based on LIDAR analysis conducted by Aled Williams.
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16Llethr Hir3.95SN 833 671
135, 136, 147
187, 200c486c3331CCarn yr HyrddodSN 79418 68033SN 835 674c453
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17Pumlumon Arwystli3.925SN 814 8771352147416431APumlumon FawrSN 80387 83956SN 808 873677Also recorded by the Ordnance Survey as Pen Pumlumon Arwystli and by the colloquial alternative Plynlimon Arwystli. Second summit of same map height positioned at SN 815 877 on the Ordnance Survey Vector Map Local hosted on the Geograph website and which is entitled the Interactive Coverage Map. Drop value from 677m bwlch spot height on the Ordnance Survey Vector Map Local hosted on the Geograph website and which is entitled the Interactive Coverage Map.
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18Drygarn Fawr3.9SN 862 584147187, 200645c25831CDrygarn FawrSN 83624 55531SN 857 754c387Also recorded by the Ordnance Survey as Trigarn. Summit height taken from the 2,115ft (644.7m) levelled height on the Ordnance Survey 1:10,560 map, which matches the rounded up 645m height on contemporary Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer maps. Triangulation pillar with 641.604m flush bracket height situated south-westward of summit at SN 86226 58375.
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19Ochr Llygnant3.838SN 796 9171352155511531APumlumon FawrSN 78865 95482SN 799 917536Analysis of a 1788 Gogerddan Estate map suggests that the name is probably a shortening of Ochr Helygnant. Summit height taken from Ordnance Survey data hosted on the Magic Maps and the WalkLakes websites. Drop value ascertained from, and included in Y Pellennig list due to, a 15.1m basic levelling survey conducted by Myrddyn Phillips.
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20Carn Fadog3.825SN 767 171160125122632AFan BrycheiniogSN 73201 18538SN 767 176486Drop value ascertained from a 26.4m basic levelling survey conducted by Myrddyn Phillips.
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21Llethr Gwaered3.800SN 79564 62624LIDAR147187, 200489.521.2South Wales B1Drygarn FawrSN 77033 65470SN 79609 63025LIDAR468.3Place Name Information: Llethr Gwaered is a locally known name for this hill. Numerical Data: 489.5m summit height and 468.3m bwlch height (21.2m drop) from LIDAR analysis conducted by Myrddyn Phillips.
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22Bera Bach3.7SH 672 67711517806.517.730BCarnedd LlywelynSH 63812 66305SH 675 676788.8806.5m summit height and 788.8m bwlch height (17.7m drop) from a Leica RX1250 survey conducted by Alan Dawson.
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23Yr Elen3.625SH 673 65111517963.355.230BCarnedd LlywelynSH 63759 66029SH 676 647908.1Also locally known by the colloquial alternative Yr Elan and recorded as Moel yr Elain by Thomas Pennant in 1781. 963.3m summit height and 908.1m bwlch height (55.2m drop) from LIDAR analysis conducted by Aled Williams.
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24Drum yr Eira3.625SN 851 589147187, 2006022031CDrygarn FawrSN 82984 56049SN 856 584582602m summit height from the Ordnance Survey non-contour Vector Map Local hosted on the Geograph website and which is entitled the Interactrive Coverage Map and from Ordnance Survey data hosted on the WalkLakes website. Drop value taken from the 582m bwlch spot height on the Ordnance Survey Vector Map Local hosted on the Geograph website and which is entitled the Interactrive Coverage Map.
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25Llechwedd Crin3.6SN 816 922135, 136214, 215539c2031APumlumon FawrSN 83757 95176SN 809 922c519
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26Cefn Perfedd3.575SJ 099 374125255600.932.330ECraig BerwynSJ 12976 35524SJ 097 371568.6Cefn Perfedd is the locally known name for this hill. The name also appears on an historical Ordnance Survey map. 600.9m summit height and 568.6m bwlch height (32.3m drop) from Leica RX1250 survey conducted by Alan Dawson.
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27Aran Fawddwy3.56SH 862 223124, 12523905.6672.930EAran FawddwySH 88374 25257 SH 85256 18958SH 850 267232.7905.6m summit height from a Leica RX1250 survey conducted by Alan Dawson. Triangulation pillar with 906.780m flush bracket height situated on the summit area. 232.7m bwlch height from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips, with the position based on LIDAR analysis initially conducted by Aled Williams and subsequently by Myrddyn Phillips.
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28Crug Gynon3.55SN 801 638147187, 200525c6631CDrygarn FawrSN 77033 65470SN 808 635c459An alternative local name is Crug Garreg Lwyd.
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29Cadair Fronwen3.5SJ 077 346125255783.473.330ECraig BerwynSJ 09970 31954SJ 076 340710.1Name composition in accordance with standard modern Welsh and upland place-name principles. 783.4m summit height and 710.1m bwlch height (73.3m drop) from Trimble GeoXH 6000 survey conducted by Myrddyn Phillips.
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30Cefn Dylif3.500SJ 08943 36943125255618.537.3North Wales A3Craig BerwynSJ 06000 38792SJ 09068 36590581.3Place Name Information: The listed name is taken from a historical Ordnance Survey map. An alternative local name is Mynydd Plas y Faerdref. Numerical Data: 618.5m summit height from a Leica RX1250 survey conducted by Alan Dawson and 581.3m bwlch height (37.3m drop) from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips and Aled Williams, with assistance from Mark Trengove.
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31Bryn Du3.5SN 940 421147, 1601884621932AClepyn MelynSN 91224 44282SN 936 431443Also recorded by the Ordnance Survey as Pimp Cwtir [sic]. The summit is situated within the Sennybridge Artillery Range Training Area.
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32Clawdd Du Mawr3.42SN 851 690
135, 136, 147
200533.325.831CCarn yr HyrddodSN 88593 68841SN 849 690507.4533.3m summit height and 507.4m bwlch height (25.8m drop) from LIDAR analysis initially conducted by Aled Williams and subsequently by Myrddyn Phillips.
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33Cerrig Llwyd y Rhestr3.39SN 848 606147187, 200c5951831CDrygarn FawrSN 86903 63402SN 848 603c577Drop value ascertained from, and included in the Pellennig list due to, a 17.8m basic levelling survey conducted by Myrddyn Phillips.
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34Banc Blaen Merin3.38SN 792 788135, 147213537c4831CDraws DrumSN 76941 81214SN 801 790c489Name composition in accordance with standard modern Welsh and upland place-name principles. Banc Blaen Merin is the locally known name for this hill. The farm (SN 800 796) and river that this name relates to has more often been recorded by the Ordnance Survey as Myherin. However, R.J.Thomas in 'Enwau Afonydd a Nentydd Cymru' (1938) provides substantial evidence for the name being Merin, with sources dating back to 1425. Additionally, the 'Blaen Myherin Farm, North Ceredigion, Historic Building Recording' report (No. 2011/11) as prepared by the Dyfed Archaeological Trust also highlights historical records for Blaen Merin dating back to c.1540.
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35Twyn Rhyd Car3.375SN 960 422147, 160188453.534.532AClepyn MelynSN 99411 42150SN 956 425419Name composition in accordance with standard modern Welsh and upland place-name principles. 453.5m summit height from Trimble GeoXH 6000 survey conducted by Myrddyn Phillips. 419.0m bwlch height from LIDAR data analysed by Aled Williams. The summit is situated within the Sennybridge Artillery Range Training Area.
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36Mynydd Lluest y Rhos3.36SN 765 92013523, 215528.3* 30.031ABanc Llechwedd MawrSN 77867 95108SN 767 925498.3Name taken from an 1844 Tithe map, which confirms this hill as being the highest point on the former sheep-walk of Lluest y Rhos. 528.3m summit height and 498.3m bwlch height (30.0m drop) from Trimble GeoXH 6000 survey conducted by Myrddyn Phillips.
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37Esgair Cerrig3.35SN 952 432147, 160188456.435.632AClepyn MelynSN 96751 46303SN 951 440420.8Esgair Cerrig is the locally known name for this hill. Also recorded by the Ordnance Survey as Pen yr Hysfa. The summit is situated within the Sennybridge Artillery Range Training Area and is known to the military as Gallows Hill. 456.4m summit height and 420.8m bwlch height (35.6m drop) from Trimble GeoXH 6000 survey conducted by Myrddyn Phillips.
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38Gnol Ddu3.35SN 823 599147187, 200529.917.231CDrygarn FawrSN 80265 57355SN 824 602512.6Gnol Ddu is the locally known name for this hill. Also recorded by the Ordnance Survey as Drum Nant yr Helyg. 529.9m summit height and 512.6m bwlch height (17.2m drop) from LIDAR analysis conducted by Aled Williams.
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39Carn Hyddgen3.34SN 792 9081352155665231APumlumon FawrSN 77500 87966SN 803 926514Carn Hyddgen is the locally known name for this hill. The highest point on Mynydd Hyddgen; one (or both) of the summit cairns is recorded by the Ordnance Survey as Carn Gwilym/Wilym, which also appears on a 1788 Gogerddan Estate map. Drop value from 514m bwlch spot height on the Ordnance Survey Vector Map Local hosted on the Geograph website and which is entitled the Interactive Coverage Map.
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40Bera Mawr3.325SH 674 68211517793.729.830BCarnedd LlywelynSH 67559 71594SH 675 681763.9793.7m summit height from a Leica RX1250 survey conducted by Alan Dawson and 763.9m bwlch height (29.8m drop) from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips.
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41Trum y Gŵr3.31SN 830 718
135, 136, 147
2005241631CCarn yr HyrddodSN 83196 75149SN 826 718508Drop value ascertained from, and included in the Pellennig list due to, a 16.5m basic levelling survey conducted by Myrddyn Phillips.
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42Priddellau3.3SN 854 677
135, 136, 147
187, 2005343131CCarn yr HyrddodSN 88594 68827SN 853 682503534m summit height taken from Ordnance Survey data hosted on the WalkLakes website.
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43Foel Grafiau3.25SN 759 92013523, 2154932731ABanc Llechwedd MawrSN 73457 89950SN 761 920466Drop value ascertained from a 26.7m basic levelling survey conducted by Myrddyn Phillips.
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44Bryn Moel3.225SN 772 91113523, 215491c3531ABanc Llechwedd MawrSN 77500 87966SN 768 914c456The name Bryn Moel also appears for this hill on a 1788 Gogerddan Estate map.
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45Foel Cedig3.2SH 981 283125255667.5180.130EFoel CedigSH 95151 29364SH 944 273487.4667.5m summit height from a Leica GS15 survey conducted by John Barnard and Graham Jackson on the 15.09.18. 487.4m bwlch height from a Trimble GeoXH 6000 survey conducted by Alan Dawson and Myrddyn Phillips on the 19.10.16.
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46Disgwylfa3.2SN 815 17816012543.5c4132AFan BrycheiniogSN 84137 15971SN 815 172c503543.5m summit height from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips.
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47Y Groes Fagl3.19SH 988 290125255* 659.015.530ECyrniau NodSJ 00911 31437SH 988 287643.5Bwlch name composition in accordance with standard modern Welsh and upland place-name principles. 659.0m summit height and 643.5m bwlch height (15.5m drop) from a Trimble GeoXH 6000 survey conducted by John Barnard and Myrddyn Phillips, with a level and staff line survey also conducted giving 15.5m of drop.
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48Llethr Brith3.185SN 756 614146, 147187527.618.731CEsgair WenSN 75542 64600SN 753 614508.9527.6m summit height and 508.9m bwlch height (18.7m drop) from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips and Aled Williams.
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49Mynydd Coch3.175SH 938 19612523569c4530ECarreg y BigSH 90727 19343SH 932 198c524Triangulation pillar with 569.366m flush bracket height situated on the summit area.
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50Cefn Glas3.16SH 819 279124, 125234974530DRhobell FawrSH 84258 25788SH 814 278452Drop value from 452m bwlch height on the Ordnance Survey enlarged Geograph map.
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51Grug Crofftau3.15SN 750 612146, 147187533.32931CEsgair WenSN 71979 60473SN 744 610504.3Grug Crofftau is a locally known name for this hill. 533.3m summit height and 504.3m bwlch height (29.0m drop) from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips and Aled Williams.
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52Foel Las3.15SN 759 92613523, 2154891631ABanc Llechwedd MawrSN 77867 95108SN 762 925473Name taken from a non-Ordnance Survey source. Name taken from a 1788 Gogerddan Estate map. Drop value from 489m summit and 473m bwlch height on the Ordnance Survey enlarged Geograph map.
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53Outer Head3.125SS 384 877159164565632BRhosili DownSS 41605 88054SS 400 872N/AThe summit is situated on an island or tidal island. This summit is the highest point on Ynys Weryn/Worm's Head, and is one of only two summits in this list that are part of a tidal island connected to the Welsh mainland.
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54Trwsgl3.1SH 663 67911517756.936.630BCarnedd LlywelynSH 63821 66302SH 667 678720.3Trwsgl is the locally known name for this hill. The name also appears on a historical Ordnance Survey map. Also recorded by the Ordnance Survey as Y Drosgl. 756.9m summit height and 720.3m bwlch height (36.6m drop) from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips.
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55Gwryd3.1SN 935 401160188456.223.132AClepyn MelynSN 93154 37135SN 938 416433.1Also recorded by the Ordnance Survey as Talwrnau. 456.2m summit height and 433.1m bwlch height (23.1m drop) from LIDAR analysis initially conducted by Aled Williams and subsequently by Myrddyn Phillips. The summit is situated within the Sennybridge Artillery Range Training Area.
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56Bryn Trapau3.08SN 816 658
135, 136, 147
187, 200470c2131CDrygarn FawrSN 79418 68033SN 811 659c449Also recorded by the Ordnance Survey as Cefn Brwynog.
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57Crib y Rhiw3.075SH 663 24812418681.329.230DY LlethrSH 64007 26781SH 660 253652.1Name composition in accordance with standard modern Welsh and upland place-name principles. 681.3m summit height and 652.1m bwlch height (29.2m drop) from separate Trimble GeoXH 6000 surveys conducted by Myrddyn Phillips and Aled Williams respectively.
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58Fan y Big3.06SO 036 20616012716.73032APen y FanSO 03330 17615SO 037 198688.2Name composition in accordance with standard modern Welsh and upland place-name principles. 716.7m summit height and 688.2m bwlch height (28.5m drop) from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips, with the drop of the hill and the position of the bwlch previously ascertained from LIDAR analysis conducted by Aled Williams.
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59Cerrig Coediog3.05SJ 113 386125255591.830.430ECraig BerwynSJ 13398 40833SJ 115 391561.4591.8m summit height and 561.4m bwlch height (30.4m drop) from a Leica 530 survey conducted by John Barnard, Graham Jackson and Myrddyn Phillips.
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60Esgair Wen3.02SN 773 605146, 147187548c9031CEsgair WenSN 77972 57617SN 790 630c458Esgair Wen is the locally known name for this hill. Triangulation pillar with 548.640m flush bracket height situated on the summit area at SN 77375 60576.
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61Picws Du3.01SN 811 21816012749.193.232AFan BrycheiniogSN 79152 24086SN 816 217655.9Also recorded by the Ordnance Survey as Ban Sir Gaer, with the name Bannau Sir Gaer referring to the ridge-tops on the Sir Gaerfyrddin side of the boundary at SN 821 223. Bwlch name composition in accordance with standard modern Welsh and upland place-name principles. 749.1m summit height and 655.9m bwlch height (93.2m drop) from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips.
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62Graig Wen3.000SN 78619 62908LIDAR146, 147187479.219.3South Wales B1Esgair WenSN 77033 65470SN 78426 63149LIDAR459.9Place Name Information: Graig Wen is a locally known name for this hill. Numerical Data: 479.2m summit height and 459.9m bwlch height (19.3m drop) from LIDAR analysis conducted by Myrddyn Phillips, with LIDAR giving a higher 479.3m position on the summit area at SN 78613 62923 that is a part of a raised ridge line of trees which is considered a relatively recent man-made construct and therefore discounted from the height of this hill.
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63Pen y Fan2.975SO 012 21516012885.7670.732APen y FanSN 98661 19991SH 931 000215Also recorded by the Ordnance Survey as Brecon Beacon, with other antiquated names discussed in the 'Dictionary of the Place-Names of Wales' by H.W.Owen and R.Morgan, 2007. 885.7m summit height and 215.0m bwlch height (670.7m drop) from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips, with the bwlch position based on LIDAR analysis initially conducted by Aled Williams, with LIDAR also giving a lower 209.3m height on the hill to hill traverse positioned at SH 93041 99532 to a disused railway cutting. Triangulation pillar with 886.358m flush bracket height once situated at the summit no longer exists.
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64Banc y Llyn2.975SN 804 652
135, 136, 147
187, 200473.721.731CDrygarn FawrSN 79418 68033SN 804 656452Name composition in accordance with standard modern Welsh and upland place-name principles. 473.7m summit height and 452.0m bwlch height (21.7m drop) from LIDAR data analysed by Aled Williams.
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65Cerrig yr Iwrch2.975SH 825 290124, 12523472c1730DArenig FawrSH 84882 30855SH 827 292c455Also recorded by the Ordnance Survey as Pen Cerig yr Eirch [sic]. Included in the Pellennig list due to map contour interpolation.
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66Twyni2.97SN 779 606146, 1471875453431CEsgair WenSN 78619 57712SN 774 603511Twyni is the locally known name for this hill.
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67Cyrniau y Llyn2.97SJ 000 244125239517c3630ECyrniau NodSH 99932 21505SJ 000 253c481Also recorded by the Ordnance Survey as Llechwedd Poeth. Summit height from the 1696ft (516.9m) levelled height on the Ordnance Survey 1:2,500 map (518m on the Ordnance Survey Vector Map Local hosted on the Geograph map and which is entitled the Interactive Coverage Map).
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68Garreg Las2.95SN 777 203160126359232AFan BrycheiniogSN 75722 22479SN 786 212543Drop value taken from the 543m bwlch spot height on the Ordnance Survey Vector Map Local hosted on the Geograph website and which is entitled the Interactive Coverage Map.
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69Gorllwyn2.95SN 917 590147200613c9031CDrygarn FawrSN 94747 59092SN 893 583c523Also recorded by the Ordnance Survey as Pen y Gorllwyn. Triangulation pillar with 613.562m flush bracket height situated on the summit area.
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70Banc Dolwen2.95SN 785 786135, 147213531c1931CDraws DrumSN 76692 80951SN 786 786c512Banc Dolwen is the locally known name for this hill. Also recorded by the Ordnance Survey as Draws Drum. 531m summit height taken from the Ordnance Survey non-contour Vector Map Local hosted on the Geograph website and which is entitled the Interactrive Coverage Map. Included in the Pellennig list due to map contour interpolation.
78
71Pt. 714.3m2.925SH 82741 35938LIDAR124, 12518, 23714.320.7North Wales A2Arenig FawrSH 85675 35761SH 82725 36128LIDAR693.6Numerical Data: 714.3m summit height and 693.6m bwlch height (20.7m drop) from LIDAR analysis conducted by Aled Williams.
79
72Esgair Llyn Du2.925SN 769 620146, 147187532.819.031CEsgair WenSN 75542 64600SN 769 611 513.8
Name composition in accordance with standard modern Welsh and upland place-name principles. An alternative local name is Blaenau/Blaen Glasffrwd. 532.8m summit height and 513.8m bwlch height (19.0m drop) from LIDAR analysis conducted by Aled Williams.
80
73Whiteford Burrows2.925SS 448 96415916429.620.432BRhosili DownSS 43885 93665SS 446 9579.229.6m summit height and 9.2m bwlch height (20.4m drop) from LIDAR analysis initially conducted by Aled Williams and subsequnetly by Myrddyn Phillips.
81
74Y Dduallt2.9SH 810 273124, 12523662c13830DRhobell FawrSH 78805 29235SH 799 264c524Name composition in accordance with standard modern Welsh and upland place-name principles.
82
75Pen yr Helgi Du2.89SH 697 63011517832.684.730BCarnedd LlywelynSH 68950 60251SH 694 633747.9832.6m summit height and 747.9m bwlch height (84.7m drop) from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips.
83
76Pt. 672.2m2.890SH 66695 48120Leica RX125011517672.258.4North Wales A2Moelwyn MawrSH 69579 47809SH 66854 47929Leica RX1250613.8Numerical Data: 672.2m summit height and 613.8m bwlch height (58.4m drop) from a Leica RX1250 survey conducted by Alan Dawson. With 1m DTM LIDAR giving two bwlch positions of equal 613.859m height at SN 66855 47929 and SN 66798 47855.
84
77Great Rhos2.89SO 182 638148200659.9378.631BGreat RhosSO 15376 64441SO 177 718281.3Also recorded by the Ordnance Survey as Rhos y Daeth and Glastwyn, with an alternative local name being Mawn Pits. 659.9m summit height and 281.3m bwlch height (378.6m drop) from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips. Triangulation pillar with 660.501m flush bracket height situated on the summit area.
85
78Yr Wyddfa2.875SH 609 543115171084.8c103930BYr WyddfaSH 62439 56861NS 758 782c46Also known by the colloquial alternative Y Wyddfa and by the English name of Snowdon. Recorded as Wyddfa Fawr in the 'Aberconwy Charter' (13th century) and as Moel y Wyddfa (various sources). Ordnance Survey historical data quotes 1084.74m height to a bolt in the upper bedrock of the mountain. The height to the base of the weather station (that is fashioned to resemble a trig pillar), and is positioned on the man-made summit plinth, is 1085.67m and was surveyed by G&J Surveys with a Leica GS15 as part of an ITV Wales programme entitled 'Snowdon: Climbing New Heights'. The old triangulation pillar had a flush bracket height of 1086.002m. Large building named Hafod Eryri and railway terminus situated just below the summit.
86
79Tap Llwyd2.875SH 719 06512423* 565.7* 15.3A3Tarren y Gesail
SH 71322 09414
SH 718 064* 550.5565.7m summit height and 550.5m bwlch height (15.3m drop) from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips.
87
80Pen y Bwlch2.875SN 775 625146, 147187504c1731CEsgair WenSN 75542 64600SN 774 624c487This hill is situated in an area known locally as Pen y Bwlch. Included in the Pellennig list due to map contour interpolation.
88
81Carnedd Llechwedd Llyfn2.86SH 857 444124, 125186432530DArenig FachSH 84568 41857SH 860 449618Name composition in accordance with standard modern Welsh and upland place-name principles. Second summit of same 643m map height positioned at SH 857 446 on the Ordnance Survey Vector Map Local hosted on the Geograph website and which is entitled the Interactive Coverage Map. Drop value from the 618m bwlch spot height on the Ordnance Survey Vector Map Local hosted on the Geograph website and which is entitled the Interactive Coverage Map.
89
82Mynydd Bychan2.86SN 774 92313523, 2154932531ABanc Llechwedd MawrSN 77867 95108SN 773 923468Also recorded by the Ordnance Survey as Mynydd Bach. Summit height from the Ordnance Survey 1:50,000 Landranger map and the Ordnance Survey enlarged Geograph map. Drop value ascertained from a 25.0m basic levelling survey conducted by Myrddyn Phillips.
90
83Waun Fach2.85SO 215 29916113810.6624.332AWaun FachSO 18690 30034SO 112 261186.3Also recorded by the Ordnance Survey as Waun Mynydd Llysiau. 810.6m summit height and 186.3m bwlch height (624.3m drop) from LIDAR analysis initially conducted by Aled Williams and subsequently by Myrddyn Phillips. Only the base of the summit triangulation pillar with 811.072m flush bracket height still exists.
91
84Pen Llithrig y Wrach2.85SH 716 62211517798.6180.330BCarnedd LlywelynSH 70600 59638SH 709 626618.4798.6m summit height and 618.4m bwlch height ( 180.3m drop) from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips. 798.576m height positioned at SH 71621 62289 recorded in the OS Trig Database given to a bolt embedded in rock that is now destroyed.
92
85Cefn Croes2.85SN 808 799
135, 136, 147
213, 2145734331CDraws DrumSN 82312 82399SN 806 811529.5Also recorded by the Ordnance Survey as Cefn Blaen Myherin [sic]. Summit height taken from the 1881ft (573.3m) levelled height on the Ordnance Survey 1:10,560 map. 529.5m bwlch height from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips.
93
86Middle Head2.85SS 387 877159164c33c2132BRhosili DownSS 41605 88054SS 386 877c12The summit is situated on an island or tidal island. This hill is one of only two in the Pellennig list that are part of a tidal island connected to the Welsh mainland.
94
87Cadair Berwyn2.84SJ 072 327125255826.6* 19.030ECraig BerwynSJ 09970 31954SJ 071 325807.6Cadair Berwyn is the locally known name for this hill. 826.6m summit height and 807.6m bwlch height (19.0m drop) from Trimble GeoXH 6000 survey conducted by Myrddyn Phillips. Triangulation pillar with 826.922m flush bracket height situated on the summit area.
95
88Carnedd y Filiast2.84SH 871 445124, 12518669c31730DArenig FachSH 88162 47240SH 826 442c352Triangulation pillar with 669.645m flush bracket height situated on the summit area.
96
89Foel Fras2.84SN 765 92613523, 215528.767.631ABanc Llechwedd MawrSN 77867 95108SN 764 936461.2The name Foel Fras also appears for this hill on a 1788 Gogerddan Estate map. 528.7m summit height and 461.2m bwlch height (67.6m drop) from Trimble GeoXH 6000 survey conducted by Myrddyn Phillips.
97
90Fan Brycheiniog2.83SN 824 22016012802.7424.232AFan BrycheiniogSN 85185 21450SN 870 195378.5An alternative local name is Fan Foel and it has also been recorded by the Ordnance Survey as Tŵr y Fan Foel and Ban Gron, with the name Bannau Brycheiniog, which appears on older Ordnance Survey maps, referring to the ridge-tops on the Sir Frycheiniog (historic county) side of the boundary at SN 821 223. Bwlch name composition in accordance with standard modern Welsh and upland place-name principles. This summit is the highest point of Mynydd Du with the 802.7m summit height ascertained from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips. A triangulation pillar with an 801.928m flush bracket height is situated southward of the summit at grid reference SN 825 218. 378.5m bwlch height from LIDAR analysis conducted by Aled Williams.
98
91Craig Berwyn2.825SJ 071 323125255* 832.0347.330ECraig BerwynSJ 09970 31954SJ 016 305484.7Craig Berwyn is the locally known name for this hill. 832.0m summit height and 484.7m bwlch height (347.3m drop) from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips, with the bwlch position based on LIDAR analysis initially conducted by Aled Williams and subsequently by Myrddyn Phillips. Summit cairn probably recorded as Carnedd Fadyn by Edward Llwyd in 1696.
99
92Craig Gwrelyg2.825SO 055 20316012753.918.932APen y FanSO 05569 17505SO 057 205735.1Name composition in accordance with standard modern Welsh and upland place-name principles. Craig Gwrelyg is the locally known name for this hill. This hill name directly relates to the name recorded on current Ordnance Survey maps as Craig Cwareli. However, local information suggests that this name is positioned incorrectly by the Ordnance Survey and that the composition is closer to the forms recorded on historical Ordnance Survey maps. An alternative local name is Moon Crater. 753.9m summit height and 735.1m bwlch height (18.9m drop) from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips.
100
93Pt. 643.2m2.825SH 648 22912418643.221.730DY LlethrSH 65683 20198SH 652 229621.4643.2m summit height and 621.4m bwlch height (21.7m drop) from a Trimble GeoXH 6000 survey conducted by John Barnard, Graham Jackson and Myrddyn Phillips.