Y Pedwarau - The 400m Hills of Wales
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© 2013 - 2017 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 Pedwarau - The 400m Hills of Wales. Welsh hills at or above 400m and below 500m in height with 30m minimum drop.
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Including five categories of Sub hills:
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500m Sub-Pedwarau - Welsh hills at or above 500m and below 510m in height with 30m minimum drop.
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500m Double Sub-Pedwarau - Welsh hills at or above 500m and below 510m in height with 20m or more and below 30m of drop.
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400m Sub-Pedwarau - Welsh hills at or above 400m and below 500m in height with 20m or more and below 30m of drop.
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390m Sub-Pedwarau - Welsh hills at or above 390m and below 400m in height with 30m minimum drop.
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390m Double Sub-Pedwarau - Welsh hills at or above 390m and below 400m in height with 20m or more and below 30m of drop.
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Y Pedwarau (Carneddau)
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NameSummit Height (m)RegionSub-Region
1:50,000 map
1:25,000 map
Cardinal HillSummit Grid ReferenceDrop (m)Notes
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Crimpiau475
North Wales Region A
A111517Creigiau Gleision
SH 73303 59567 (HH)
91384m bwlch height taken from the Ordnance Survey enlarged mapping hosted on the Geograph website.
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Clip yr Orsedd* 426.6
North Wales Region A
A111517Tal y Fan
SH 71185 74743 (S)
* 39.5426.6m summit height and 387.2m bwlch height (39.5m drop) from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips.
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Pt. 416.9m* 416.9
North Wales Region A
A111517Creigiau Gleision
SH 74560 58930 (S)
* 79.5416.9m summit height and 337.4m bwlch height (79.5m drop) from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips.
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Waun Bryn-gwenith414
North Wales Region A
A111517Carnedd Llywelyn
SH 74733 67413 (HH)
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Moel Faban* 408.7
North Wales Region A
A111517Carnedd Llywelyn
SH 63418 67984 (S)
* 46.0408.7m summit height and 362.7m bwlch height (46.0m drop) from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips.
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Clogwyn Manod* 403.6
North Wales Region A
A111517Creigiau Gleision
SH 74169 59314 (S)
* 44.1403.6m summit height and 359.6m bwlch height (44.1m drop) from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips.
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Mynydd Deulyn* 400.1
North Wales Region A
A111517Creigiau Gleision
SH 75936 61265 (S)
c105400.1 summit height from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips.
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500m Double Sub-Pedwarau (Carneddau)
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NameSummit Height (m)RegionSub-Region
1:50,000 map
1:25,000 map
Cardinal HillSummit Grid ReferenceDrop (m)Notes
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Pen y Gadair507North Wales Region AA111517Carnedd LlywelynSH 73348 69363 (HH)c21
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Cefn Cyfarwydd503North Wales Region AA111517Creigiau GleisionSH 75204 63070 (HH)26
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400m Sub-Pedwarau (Carneddau)
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NameSummit Height (m)RegionSub-Region
1:50,000 map
1:25,000 map
Cardinal HillSummit Grid ReferenceDrop (m)Notes
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Pt.403.8m* 403.8North Wales Region AA111517Creigiau GleisionSH 74675 59467 (S)* 28.9403.8m summit height and 374.9m bwlch height (28.9m drop) from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips.
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Craig Celynin407North Wales Region AA111517Tal y FanSH 74669 73378 (SH)c28
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Pt. 482m482North Wales Region AA111517Carnedd LlywelynSH 73805 64592 (SH)27455m bwlch height taken from the Ordnance Survey enlarged mapping hosted on the Geograph website.
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Foel Dduarthc450North Wales Region AA111517Carnedd LlywelynSH 68169 71480 (I)c21
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390m Double Sub-Pedwarau (Carneddau)
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NameSummit Height (m)RegionSub-Region
1:50,000 map
1:25,000 map
Cardinal HillSummit Grid ReferenceDrop (m)Notes
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Penamen Mawr* 390.4North Wales Region AA111517Tal y FanSH 69865 75523 (S)* 26.9390.4m summit height and 363.5m bwlch height (26.9m drop) from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips.
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Y Pedwarau (Glyderau)
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NameSummit Height (m)RegionSub-Region
1:50,000 map
1:25,000 map
Cardinal HillSummit Grid ReferenceDrop (m)Notes
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Moel Berfedd482
North Wales Region A
A111517Glyder Fawr
SH 65151 55686 (HH)
c68
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Moel y Ci* 409.9
North Wales Region A
A1114, 11517Y Garn
SH 59083 65767 (S)
c72409.9m summit height from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips.
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Parc Drysgol* 403.9
North Wales Region A
A1114, 11517, 263Y Garn
SH 58934 64482 (S)
* 61.8403.9m summit height and 342.1m bwlch height (61.8m drop) from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips.
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Moel Rhiwen* 401.5
North Wales Region A
A1114, 11517, 263Y Garn
SH 58141 64300 (S)
* 43.2401.5m summit height and 358.3m bwlch height (43.2m drop) from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips.
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Y Pedwarau (Yr Wyddfa)
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NameSummit Height (m)RegionSub-Region
1:50,000 map
1:25,000 map
Cardinal HillSummit Grid ReferenceDrop (m)Notes
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Cefn Du442
North Wales Region A
A1114, 11517, 254, 263Moel Eilio
SH 54845 60381 (HH)
c71Triangulation pillar with 441.350m flush bracket height situated on the summit area.
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Clogwyn Pen Llechenc420
North Wales Region A
A111517Yr Wyddfa
SH 64165 54570 (HH)
c35
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400m Sub-Pedwarau (Yr Wyddfa)
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NameSummit Height (m)RegionSub-Region
1:50,000 map
1:25,000 map
Cardinal HillSummit Grid ReferenceDrop (m)Notes
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Derlwyn* 416.4North Wales Region AA111517Yr WyddfaSH 58856 58610 (S)* 20.4416.4m summit height and 396.0m bwlch height (20.4m drop) from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips.
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Y Pedwarau (Moel Hebog)
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NameSummit Height (m)RegionSub-Region
1:50,000 map
1:25,000 map
Cardinal HillSummit Grid ReferenceDrop (m)Notes
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Y Gurn459
North Wales Region A
A111517, 254Pt. 734m
SH 55265 50093 (HH)
c51459m summit height taken from the Ordnance Survey enlarged mapping hosted on the Geograph website.
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Moel Tryfan* 429.0
North Wales Region A
A111517, 254Mynydd Mawr
SH 51532 56196 (HH)
* 102.6429.0m summit height and 326.4m bwlch height (102.6m drop) from a Leica GS15 survey conducted by John Barnard, Graham Jackson and Myrddyn Phillips. Triangulation pillar with 427.024m flush bracket height situated on the summit area.
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Castell445
North Wales Region A
A111517, 254Moel Hebog
SH 55949 49340 (HH)
33445m summit height taken from the Ordnance Survey enlarged mapping on the Geograph website. 108ft (32.9m) drop value from a basic levelling survey conducted by Myrddyn Phillips.
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Ffridd Arw Uchaf422
North Wales Region A
A111517, 254Pt. 734m
SH 51811 51141 (SH)
c35Ffridd Arw Uchaf is a locally known name.
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400m Sub-Pedwarau (Moel Hebog)
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