Y Pellennig - Remotest Hills of Wales - Mainland Wales
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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 Reference1:50,000 Map1:25,000 mapSummit Height (m)
Drop (m)
Section
Cardinal HillGrid Reference (Nearest Paved Public Road)Bwlch Grid ReferenceBwlch Height (m)Notes
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1Tyle Garw4.875SN 784 17816012467.34132AFan Brycheiniog
SN 78492 12918
SN 786 174426467.3m summit height from Trimble GeoXH 6000 survey conducted by Myrddyn Phillips. Drop value from 426m bwlch height on the Ordnance Survey enlarged Geograph map.
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2Foel Uchaf4.85SN 806 622147187, 2004763131CDrygarn Fawr
SN 77033 65470
SN 805 624445Foel Uchaf is the prioritised locally known name for this hill. Foel Uchaf and Foel Isaf are also locally known by the collective names of Moelydd and Foel Moel Prysgau. Drop value from 445m bwlch height on the Ordnance Survey enlarged Geograph map.
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3Cerrig Coegion4.75SN 790 17616012473.3c5732AFan Brycheiniog
SN 78492 12918
SN 795 187c416Cerrig 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. 473.3m summit height from Trimble GeoXH 6000 survey conducted by Myrddyn Phillips. Triangulation pillar with 471.830m flush bracket height situated southward of summit at grid reference SN 790 174.
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4Esgair y Llyn4.535SN 841 701
135, 136, 147
200528.815.531CCarn yr Hyrddod
SN 88586 69399
SN 838 700513.3
528.8m summit height and 513.3m bwlch height (15.5m drop) from LIDAR data analysed by Aled Williams.
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5Carnedd Uchaf4.52SH 686 66911517924.9* 33.030BCarnedd Llywelyn
SH 73190 66331
SH 691 673891.9Carnedd 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. 924.9m summit height and 891.9m bwlch height (33.0m drop) from a Leica RX1250 survey conducted by Alan Dawson.
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6Cnapyn Drawsffos4.51SN 834 706
135, 136, 147
200548.14631CCarn yr Hyrddod
SN 83196 75149
SN 831 713502548.1m summit height from LIDAR data analysed 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 65911517975.441.630BCarnedd Llywelyn
SH 73190 66331
SH 688 653933.8975.4m summit height and 933.8m bwlch height (41.6m drop) from a Leica RX1250 survey conducted by Alan Dawson. Emergency mountain refuge situated just below the summit.
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8Foel Ganol4.3SN 809 916135, 136214, 215548c2531APumlumon Fawr
SN 80076 95840
SN 808 918c523Foel 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, 2155653331APumlumon Fawr
SN 77500 87966
SN 795 915532Foel 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'. The drop value was ascertained from a basic levelling survey conducted by Myrddyn Phillips in conjunction with Ordnance Survey summit heights.
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10Esgair Garthen4.26SN 825 642147187, 2005072131CDrygarn Fawr
SN 86717 63600
SN 823 639486Drop value from 486m bwlch height on the Ordnance Survey enlarged Geograph map.
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11Llethr Gwaered4.225SN 801 626147187, 2004902631CDrygarn Fawr
SN 77033 65470
SN 794 630464Llethr Gwaered is the locally known name for this hill.
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12Blaen Rhestr4.2SN 843 693
135, 136, 147
200547c3831CCarn yr Hyrddod
SN 88582 69378
SN 837 689c509Roofed and locked building situated south-westward of the summit.
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13Foel Isaf4.075SN 803 614147187, 200473c3931CDrygarn Fawr
SN 79297 57549
SN 803 618c434Foel Isaf is the prioritised locally known name for this hill. Foel Uchaf and Foel Isaf are also locally known by the collective names of Moelydd and Foel Moel Prysgau.
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14Foel Fras3.975SH 696 68111517944.162.830BCarnedd Llywelyn
SH 73190 66331
SH 688 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 64311517106475030BCarnedd Llywelyn
SH 67752 60472
SH 675 604314Name composition in accordance with standard modern Welsh and upland place-name principles. Drop value from 314m bwlch height on Harvey Maps.
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16Llethr Hir3.95SN 833 671
135, 136, 147
187, 200c486c3331CCarn yr Hyrddod
SN 79418 68033
SN 835 674c453
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17Pumlumon Arwystli3.925SN 814 8771352147416431APumlumon Fawr
SN 80387 83956
SN 808 873677Also recorded by the Ordnance Survey as Pen Pumlumon Arwystli and by the colloquial alternative Plynlimon Arwystli. Second summit of same map height at SN 815 877 on the Ordnance Survey enlarged Geograph map. Drop value from 677m bwlch height on the Ordnance Survey enlarged Geograph map.
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18Drygarn Fawr3.9SN 862 584147187, 200645c25731CDrygarn Fawr
SN 83624 55531
SN 857 754c388Also recorded by the Ordnance Survey as Trigarn. Summit height from 2,115ft (644.7m) levelled height on the Ordnance Survey 1:10,560 map, which matches the rounded up 645m height on current Ordnance Survey 1:50,000 Landranger maps. Triangulation pillar with 641.604m flush bracket height situated at SN 862 583.
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19Ochr Llygnant3.838SN 796 9171352155501531APumlumon Fawr
SN 78865 95482
SN 799 917535Analysis of a 1788 Gogerddan Estate map suggests that the name is probably a shortening of Ochr Helygnant. Summit height from 1804ft (549.9m) height on the Ordnance Survey 1:10,560 map. 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 Brycheiniog
SN 73201 18538
SN 767 177486Drop value ascertained from a 26.4m basic levelling survey conducted by Myrddyn Phillips.
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21Bera Bach3.7SH 672 67711517806.517.830BCarnedd Llywelyn
SH 63812 66305
SH 675 676788.8806.5m summit height and 788.8m bwlch height (17.8m drop) from a Leica RX1250 survey conducted by Alan Dawson.
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22Yr Elen3.625SH 673 65111517962c5430BCarnedd Llywelyn
SH 63759 66029
SH 676 647c908Also locally known by the colloquial alternative Yr Elan and recorded as Moel yr Elain by Thomas Pennant in 1781.
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23Drum yr Eira3.625SN 851 590147187, 200c601c1931CDrygarn Fawr
SN 82984 56049
SN 856 584582Drop value from 582m bwlch height on the Ordnance Survey enlarged Geograph map.
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24Llechwedd Crin3.6SN 816 922135, 136214, 215539c2031APumlumon Fawr
SN 83757 95176
SN 809 922c519
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25Cefn Perfedd3.575SJ 099 373125255600.832.330ECraig Berwyn
SJ 12976 35524
SJ 097 371568.5Cefn Perfedd is the locally known name for this hill. The name also appears on an historical Ordnance Survey map. 600.8m summit height and 568.5m bwlch height (32.3m drop) from Leica RX1250 GPS survey conducted by Alan Dawson.
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26Aran Fawddwy3.56SH 862 223124, 12523905.667130EAran FawddwySH 88374 25257 SH 85256 18958SH 850 267235Triangulation pillar with 906.780m flush bracket height situated on summit area. 905.6m summit height from a Leica RX1250 survey conducted by Alan Dawson. Drop value from 235m bwlch height on the Ordnance Survey 1:50,000 Landranger map (234m on current Harvey Maps).
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27Crug Gynon3.55SN 801 638147187, 2005256431CDrygarn Fawr
SN 77033 65470
SN 808 636461An alternative local name is Crug Garreg Lwyd. Drop value from 461m bwlch height on the Ordnance Survey enlarged Geograph map.
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28Cadair Fronwen3.5SJ 077 346125255783.473.330ECraig Berwyn
SJ 09970 31954
SJ 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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29Cefn Dylif3.5SJ 089 369125255621c3630ECraig Berwyn
SJ 06000 38792
SJ 090 365c585Name taken from a historical Ordnance Survey map. An alternative local name is Mynydd Plas y Faerdref.
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30Bryn Du3.5SN 940 421147, 1601884621932AClepyn Melyn
SN 91224 44282
SN 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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31Clawdd Du Mawr3.42SN 851 690
135, 136, 147
2005352731CCarn yr Hyrddod
SN 88593 68841
SN 849 690508Drop value ascertained from a 26.5m basic levelling survey conducted by Myrddyn Phillips.
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32Cerrig Llwyd y Rhestr3.39SN 848 606147187, 2005911831CDrygarn Fawr
SN 86903 63402
SN 848 603573Summit height from 1,938ft (590.7m) levelled height on the Ordnance Survey 1:10,560 map. Drop 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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33Banc Blaen Merin3.38SN 792 787135, 147213537c4931CDraws Drum
SN 76941 81214
SN 801 790c488Name 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 resords for Blaen Merin dating back to c.1540.
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34Twyn Rhyd Car3.375SN 960 422147, 160188453.534.532AClepyn Melyn
SN 99411 42150
SN 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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35Mynydd Lluest y Rhos3.36SN 765 92013523, 215528.23031ABanc Llechwedd Mawr
SN 77867 95108
SN 767 925498.2Name taken from a non-Ordnance Survey source. Name taken from an 1844 Tithe map, which confirms this hill as being the highest point on the former sheep-walk of Lluest y Rhos. 528.2m summit height and 498.2m bwlch height (30.0m drop) from Trimble GeoXH 6000 survey conducted by Myrddyn Phillips.
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36Esgair Cerrig3.35SN 952 432147, 160188456.435.632AClepyn Melyn
SN 96751 46303
SN 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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37Ganol Ddu3.35SN 823 599147187, 200c531c1731CDrygarn Fawr
SN 80265 57355
SN 824 603c514Ganol Ddu is the locally known name for this hill. Also recorded by the Ordnance Survey as Drum Nant yr Helyg and occasionally referred to using the colloquial form of Gnol Ddu. Included in the Pellennig list due to map contour interpolation.
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38Carn Hyddgen3.34SN 792 9081352155665231APumlumon Fawr
SN 77500 87966
SN 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 height on the Ordnance Survey enlarged Geograph map.
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39Bera Mawr3.325SH 674 68211517793.729.830BCarnedd Llywelyn
SH 67559 71594
SH 675 681763.9793.7m summit height from a Leica RX1250 survey conducted by Alan Dawson. 763.9m bwlch height from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips.
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40Trum y Gŵr3.31SN 830 718
135, 136, 147
2005241631CCarn yr Hyrddod
SN 83196 75149
SN 827 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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41Priddellau3.3SN 854 677
135, 136, 147
187, 200c534c3131CCarn yr Hyrddod
SN 88594 68827
SN 853 682503The land at the designated summit grid reference is approximately one metre higher when compared to the land where the 533m spot height at grid reference SN 850 676 appears on the Ordnance Survey 1:25,000 Explorer and enlarged Geograph maps.
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42Foel Grafiau3.25SN 759 92013523, 2154932731ABanc Llechwedd Mawr
SN 73457 89950
SN 761 920466Drop value ascertained from a 26.7m basic levelling survey conducted by Myrddyn Phillips.
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43Bryn Moel3.225SN 772 91113523, 215491c3531ABanc Llechwedd Mawr
SN 77500 87966
SN 768 914c456The name Bryn Moel also appears for this hill on a 1788 Gogerddan Estate map.
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44Disgwylfa3.2SN 815 17816012543.5c3732AFan Brycheiniog
SN 84137 15971
SN 815 173c507543.5m summit height from Trimble GeoXH 6000 survey conducted by Myrddyn Phillips.
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45Y Groes Fagl3.19SH 988 29012525565915.530ECyrniau Nod
SJ 00911 31437
SH 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 Trimble GeoXH 6000 survey conducted by Myrddyn Phillips, which compliments a 15.5m line survey drop value conducted by G&J Surveys.
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46Llethr Brith3.185SN 756 614146, 1471875271831CEsgair Wen
SN 75542 64600
SN 753 614509Summit height of 527m and bwlch height of 509m (18m drop) from the Ordnance Survey enlarged Geograph map.
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47Mynydd Coch3.175SH 938 196125235694030ECarreg y Big
SH 90727 19343
SH 933 197529Triangulation pillar with 569.366m flush bracket height situated on summit area.
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48Cefn Glas3.16SH 819 279124, 125234974530DRhobell Fawr
SH 84258 25788
SH 814 278452Drop value from 452m bwlch height on the Ordnance Survey enlarged Geograph map.
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49Grug Crofftau3.15SN 750 612146, 147187532c2831CEsgair Wen
SN 71979 60473
SN 744 608c504Grug Crofftau is the locally known name for this hill.
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50Foel Las3.15SN 759 92613523, 2154891631ABanc Llechwedd Mawr
SN 77867 95108
SN 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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51Outer Head3.125SS 384 877159164565632BRhosili Down
SS 41605 88054
SS 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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52Trwsgl3.1SH 663 67911517756.936.630BCarnedd Llywelyn
SH 63821 66302
SH 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 Trimble GeoXH 6000 survey conducted by Myrddyn Phillips.
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53Cyrniau Nod3.1SH 988 279125239, 25566617930ECyrniau Nod
SJ 01783 26871
SH 944 273487.4Summit height from 2185ft (666.0m) levelled height on the Ordnance Survey 1:10,560 map (667m on current Ordnance Survey maps). 487.4m bwlch height from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips.
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54Gwryd3.1SN 935 4021601884562432AClepyn Melyn
SN 93154 37135
SN 938 416432Also recorded by the Ordnance Survey as Talwrnau. Summit height from the Ordnance Survey enlarged Geograph map. The summit is situated within the Sennybridge Artillery Range Training Area.
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55Bryn Trapau3.08SN 816 658
135, 136, 147
187, 200470c2131CDrygarn Fawr
SN 79418 68033
SN 811 659c449Also recorded by the Ordnance Survey as Cefn Brwynog.
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56Crib y Rhiw3.075SH 663 24812418681.2c2830DY Llethr
SH 64007 26781
SH 661 252c653Name composition in accordance with standard modern Welsh and upland place-name principles. 681.2m summit height from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips.
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57Esgair Llyn Du3.075SN 767 617146, 1471875342031CEsgair Wen
SN 75542 64600
SN 769 611 SN 769 614514Name composition in accordance with standard modern Welsh and upland place-name principles. An alternative local name is Blaenau/Blaen Glasffrwd. Drop value from 534m summit and 514m bwlch height on the Ordnance Survey enlarged Geograph map.
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58Fan y Big3.06SO 036 206160127193032APen y Fan
SO 03330 17615
SO 037 198689Name composition in accordance with standard modern Welsh and upland place-name principles. Drop value from 689m bwlch height on the Ordnance Survey enlarged Geograph map.
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59Cerrig Coediog3.05SJ 113 386125255591.830.430ECraig Berwyn
SJ 13398 40833
SJ 115 391561.35591.8m summit height and 561.35m bwlch height (30.4m drop) from Leica 530 Differential GPS survey conducted by G&J Surveys.
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60Esgair Wen3.02SN 773 605146, 147187548c9031CEsgair Wen
SN 77972 57617
SN 790 630c458Esgair Wen is the locally known name for this hill. Triangulation pillar with 548.640m flush bracket height situated on summit area.
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61Picws Du3.01SN 811 21816012749.193.232AFan Brycheiniog
SN 79152 24086
SN 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 Trimble GeoXH 6000 survey conducted by Myrddyn Phillips.
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62Graig Wen3SN 786 629146, 147187479c1631CEsgair Wen
SN 77033 65470
SN 784 631c463Graig Wen is the locally known name for this hill. Included in the Pellennig list due to map contour interpolation.
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63Pen y Fan2.975SO 012 2151601288667232APen y Fan
SN 98661 19991
SH 931 000214.4Also 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. Triangulation pillar with 886.358m flush bracket height once situated at the summit no longer exists. 214.4m bwlch height from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips.
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64Banc y Llyn2.975SN 804 652
135, 136, 147
187, 200473.721.731CDrygarn Fawr
SN 79418 68033
SN 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, 12523472c1730DArennig Fawr
SH 84882 30855
SH 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 Wen
SN 78619 57712
SN 774 603511Twyni is the locally known name for this hill.
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67Cyrniau y Llyn2.97SJ 000 244125239517c3830ECyrniau Nod
SH 99932 21505
SJ 000 252c479Also recorded by the Ordnance Survey as Llechwedd Poeth. Summit height from 1696ft (516.9m) levelled height on the Ordnance Survey 1:2,500 map (518m on the Ordnance Survey enlarged Geograph map).
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68Garreg Las2.95SN 777 203160126359232AFan Brycheiniog
SN 75722 22479
SN 786 212543Drop value from 543m bwlch height on the Ordnance Survey enlarged Geograph map.
76
69Gorllwyn2.95SN 917 590147200613c8831CDrygarn Fawr
SN 94747 59092
SN 893 583c525Also recorded by the Ordnance Survey as Pen y Gorllwyn. Triangulation pillar with 613.562m flush bracket height situated on summit area.
77
70Banc Dolwen2.95SN 785 786135, 147213c532c1931CDraws Drum
SN 76692 80951
SN 787 786c513Banc Dolwen is the locally known name for this hill. Also recorded by the Ordnance Survey as Draws Drum. Included in the Pellennig list due to map contour interpolation.
78
71Pt. 712m2.925SH 827 359124, 12518, 237121830DArennig Fawr
SH 85675 35761
SH 827 361694Drop value ascertained from, and included in the Pellennig list due to, a basic levelling survey conducted by John and Anne Nuttall.
79
72Y Dduallt2.9SH 810 273124, 12523662c13830DRhobell Fawr
SH 78805 29235
SH 799 264c524Name composition in accordance with standard modern Welsh and upland place-name principles.
80
73Pen yr Helgi Du2.89SH 697 63011517832.684.730BCarnedd Llywelyn
SH 68950 60251
SH 694 633747.8832.6m summit height and 747.8m bwlch height (84.7m drop) from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips.
81
74Pt. 672.2m2.89SH 666 48111517672.258.430BMoelwyn Mawr
SH 69579 47809
SH 668 479613.8672.2m summit height and 613.8m bwlch height (58.4m drop) from a Leica RX1250 survey conducted by Alan Dawson.
82
75Great Rhos2.89SO 182 638148200660c37531BGreat Rhos
SO 15376 64441
SN 927 800c285Also recorded by the Ordnance Survey as Rhos y Daeth and Glastwyn, with an alternative local name being Mawn Pits. Triangulation pillar with 660.501m flush bracket height situated on summit area.
83
76Yr Wyddfa2.875SH 609 543115171085103930BYr Wyddfa
SH 62439 56861
NS 768 78546Also 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.
84
77Pt. 504m, Pen y Bwlch2.875SN 776 625146, 147187504c1731CEsgair Wen
SN 75542 64600
SN 774 625c487This hill is situated in an area known locally as Pen y Bwlch. Included in the Pellennig list due to map contour interpolation.
85
78Carnedd Llechwedd Llyfn2.86SH 857 444124, 125186432530DArennig Fach
SH 84568 41857
SH 860 449618Name composition in accordance with standard modern Welsh and upland place-name principles. Second summit of same map height at SH 857 446 on the Ordnance Survey enlarged Geograph map. Drop value from 618m bwlch height on the Ordnance Survey enlarged Geograph map.
86
79Mynydd Bychan2.86SN 774 92313523, 2154932531ABanc Llechwedd Mawr
SN 77867 95108
SN 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.
87
80Waun Fach2.85SO 215 2991611381162232AWaun Fach
SO 18690 30034
SO 142 225189Also recorded by the Ordnance Survey as Waun Mynydd Llysiau. Summit height from the Ordnance Survey 1:50,000 Landranger map. Only the base of the summit triangulation pillar (811.072m flush bracket height) still exists. 189.0m bwlch height from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips.
88
81Pen Llithrig y Wrach2.85SH 716 62211517798.6180.330BCarnedd Llywelyn
SH 70600 59638
SH 709 626618.3798.6m summit height and 618.3m bwlch height ( 180.3m drop) from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips. Summit height of 798.576m in the OS Trig Database at SH 71621 62289 from a former bolt embedded in rock.
89
82Cefn Croes2.85SN 808 799
135, 136, 147
213, 214573c4431CDraws Drum
SN 82312 82399
SN 806 811c529Also recorded by the Ordnance Survey as Cefn Blaen Myherin [sic]. Summit height from 1881ft (573.3m) levelled height on the Ordnance Survey 1:10,560 map.
90
83Middle Head2.85SS 387 877159164c33c2132BRhosili Down
SS 41605 88054
SS 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.
91
84Cadair Berwyn2.84SJ 072 327125255826.51930ECraig Berwyn
SJ 09970 31954
SJ 071 325807.5Cadair Berwyn is the locally known name for this hill. 826.5m summit height and 807.5m bwlch height (19.0m drop) from Trimble GeoXH 6000 survey conducted by Myrddyn Phillips. Triangulation pillar with 826.922m flush bracket height situated on summit area.
92
85Carnedd y Filiast2.84SH 871 445124, 12518669c31730DArennig Fach
SH 88162 47240
SH 826 442c352Triangulation pillar with 669.645m flush bracket height situated on summit area.
93
86Foel Fras2.84SN 765 92613523, 215528.767.631ABanc Llechwedd Mawr
SN 77867 95108
SN 764 936461.1The name Foel Fras also appears for this hill on a 1788 Gogerddan Estate map. 528.7m summit height and 461.1m bwlch height (67.6m drop) from Trimble GeoXH 6000 survey conducted by Myrddyn Phillips.
94
87Fan Brycheiniog2.83SN 824 22016012802.7424.232AFan Brycheiniog
SN 85185 21450
SN 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 data analysed by Aled Williams.
95
88Craig Berwyn2.825SJ 071 323125255832c34630ECraig Berwyn
SJ 09970 31954
SJ 016 305c486Craig Berwyn is the locally known name for this hill. 832.0m summit height from Trimble GeoXH 6000 survey conducted by Myrddyn Phillips. Summit cairn probably recorded as Carnedd Fadyn by Edward Llwyd in 1696.
96
89Craig Gwrelyg2.825SO 054 203160127541832APen y Fan
SO 05569 17505
SO 057 205736Name 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. Drop value from 736m bwlch height on the Ordnance Survey enlarged Geograph map.
97
90Pt. 643m2.825SH 648 22912418643.121.730DY Llethr
SH 65683 20198
SH 652 229621.4643.1m summit height and 621.4m bwlch height (21.7m drop) from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips.
98
91Tapiau y Gell2.825SH 927 16812523c5371930ECarreg y Big
SH 95522 16386
SH 930 169c518Tapiau y Gell is the locally known name for this hill. Drop value ascertained from, and included in the Pellennig list due to, a 18.9m basic levelling survey conducted by Myrddyn Phillips.
99
92Cribyn2.8SO 023 2131601279513032APen y Fan
SO 03795 23719
SO 019 211665Also recorded by the Ordnance Survey as Ban Perfedd.
100
93Foel Uchaf2.8SN 768 92513523, 21552222.931ABanc Llechwedd Mawr
SN 77867 95108
SN 768 922499.1522.0m summit height and 499.1m bwlch height (22.9m drop) from Trimble GeoXH 6000 survey conducted by Myrddyn Phillips.
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