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© 2021 Myrddyn Phillips. 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 author.
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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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© Crown: CHERISH PROJECT 2019. Produced with EU funds through the Ireland Wales Co-operation Programme 2014-2020. All material made freely available through the Open Government Licence.
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The Welsh P15s
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All Welsh Hills with 15m minimum drop, irrespective of their height. With an accompanying sub list taking in all Welsh hills with 14m or more and below 15m of drop
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Group 1: Mynydd Twr
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NameSummit Height (m)1:50,000 map1:25,000 mapSummit Grid ReferenceSummit Grid Reference extracted fromDrop (m)Bwlch Grid ReferenceBwlch Grid Reference extracted fromBwlch Height (m)Notes
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Mynydd Twr220.1114262SH 21853 82945LIDAR220.1N/AN/AN/APlace Name Information: Hill name written as Mynydd Tŵr on contemporary Ordnance Survey maps with the English name of Holyhead Mountain also being given. Numerical Data: 220.1m summit height from LIDAR analysis conducted by Myrddyn Phillips. Triangulation pillar with 220.370m flush bracket height situated on the summit area. Listing History: First published listing - The Relative Hills of Britain published in 1992 by Cicerone Press and compiled by Alan Dawson.
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Yr Arwydd177.5114263SH 47242 85417Trimble GeoXH 6000177.5N/AN/AN/ANumerical Data: 177.5m summit height from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips. Triangulation pillar with 178.003m flush bracket height situated on the summit area at SH 47243 85417. Listing History: First published listing - The Relative Hills of Britain published in 1992 by Cicerone Press and compiled by Alan Dawson.
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Bwrdd Arthur164.7114263SH 58577 81284Trimble GeoXH 6000137.8SH 51561 77533LIDAR27.0Numerical Data: 164.7m summit height from a Trimble GeoXH 6000 survey and 27.0m bwlch height (137.8m drop) from LIDAR analysis conducted by Myrddyn Phillips. Triangulation pillar with 164.287m flush bracket height situated on the summit area at SH 58570 81288. Listing History: First known listing - The Yeamans of England + Wales compiled in 1992/1993 by E D 'Clem' Clements and first published on the RHB Yahoo Group file database in 2003.
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Mynydd Eilian176.9114263SH 47282 91719Trimble GeoXH 6000123.6SH 42808 86451LIDAR53.3Numerical Data: 176.9m summit height from a Trimble GeoXH 6000 survey and 53.3m bwlch height (123.6m drop) from LIDAR analysis conducted by Myrddyn Phillips. Triangulation pillar with 177.393m flush bracket height situated on the summit area at SH 47283 91720. Listing History: First known listing - The Yeamans of England + Wales compiled in 1992/1993 by E D 'Clem' Clements and first published on the RHB Yahoo Group file database in 2003.
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Mynydd y Garn170114262SH 31497 90679hand-held GPS via DoBIHc106SH 34775 88547interpolationc64Place Name Information: Hill name written as Mynydd-y-Garn on the contemporary Ordnance Survey 1:25,000 Explorer map. Numerical Data: Triangulation pillar with 170.078m flush bracket height situated on the summit area at SH 31493 90674. Listing History: First known listing - The Yeamans of England + Wales compiled in 1992/1993 by E D 'Clem' Clements and first published on the RHB Yahoo Group file database in 2003.
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Mynydd Parys148.1114263SH 44268 90538LIDAR69.1SH 46045 90623LIDAR78.9Place Name Information: Hill name written as Parys Mountain on contemporary Ordnance Survey maps. Numerical Data: 148.1m summit height and 78.9m bwlch height (69.1m drop) from LIDAR analysis conducted by Myrddyn Phillips. Triangulation pillar with 147.611m flush bracket height situated on the summit area at SH 44312 90544. Listing History: First published listing - The Welsh 10m Peaks published in 2004 on Geoff Crowder's v-g.me website and Mike Grant's 5everdene website and compiled by Myrddyn Phillips.
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Sotherby Top130.4114, 115263SH 48871 83632LIDARc66SH 46734 82741interpolationc64Place Name Information: Hill name written as Sotheby Top on the contemporary Ordnance Survey Vector Map Local hosted on the Geograph website and which is entitled the Interactive Coverage Map. Numerical Data: Conjecture as to summit position which is immersed in a dense blackthorn wood with partial LIDAR coverage giving 130.4m at SH 48871 83632, the Ordnance Survey Vector Map Local hosted on the Geograph website giving a 131m spot height at SH 48790 83528, Magic Maps giving a 130m spot height at SH 48837 83602. Two points were surveyed with the Trimble GeoXH 6000 giving 130.0m at SH 48775 83504 and 129.7m at SH 48924 83526. Listing History: First published listing - The Welsh 100m Peaks published in 2004 on Geoff Crowder's v-g.me website and Mike Grant's 5everdene website and compiled by Myrddyn Phillips.
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Pen y Foel122.5114, 115263SH 42575 84415Trimble GeoXH 6000c62SH 44053 82788interpolationc61Numerical Data: 122.5m summit height from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips. Listing History: First published listing - The Welsh 100m Peaks published in 2004 on Geoff Crowder's v-g.me website and Mike Grant's 5everdene website and compiled by Myrddyn Phillips.
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Cadair Pedwar Gwynt63.7114262SH 26346 75302LIDAR59.3SH 25393 79147LIDAR4.45Place Name Information: Cadair Pedwar Gwynt is a locally known name for the summit of this hill, with an alternate locally known name being Lady Verney's Seat. Numerical Data: 63.7m summit height and 4.45m bwlch height (59.3m drop) from LIDAR analysis conducted by Myrddyn Phillips. Triangulation pillar with 62.944m flush bracket height situated on the summit area at SH 26343 75314. Listing History: First published listing - The Welsh 30m - 99m Peaks published in 2004 on Geoff Crowder's v-g.me website and Mike Grant's 5everdene website and compiled by Myrddyn Phillips.
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Mynydd Llwydiarth158.1114, 115263SH 54126 78707Trimble GeoXH 600057.6SH 55284 79340LIDAR100.5Place Name Information: Summit is situated in the Pentraeth Forest. Numerical Data: 158.1m summit height from a Trimble GeoXH 6000 survey and 100.5m bwlch height (57.6m drop) from LIDAR analysis conducted by Myrddyn Phillips, with LIDAR giving a 158.5m summit at SH 54083 78685. Triangulation pillar with 158.496m flush bracket height situated on the summit area at SH 54034 78670. Listing History: First published listing - The Welsh 100m Peaks published in 2004 on Geoff Crowder's v-g.me website and Mike Grant's 5everdene website and compiled by Myrddyn Phillips.
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Dinas Gynfor69.3114262SH 39115 95044Trimble GeoXH 600054.2SH 39280 94837Trimble GeoXH 600015.1Numerical Data: 69.3m summit height and 15.1m bwlch height (54.2m drop) from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips. Listing History: First published listing - The Welsh 30m - 99m Peaks published in 2004 on Geoff Crowder's v-g.me website and Mike Grant's 5everdene website and compiled by Myrddyn Phillips.
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Graig Wen91.3114262SH 39734 94739Trimble GeoXH 600049.6SH 41984 91871LIDAR41.7Numerical Data: 91.3m summit height from a Trimble GeoXH 6000 survey and 41.7m bwlch height (49.6m drop) from LIDAR analysis conducted by Myrddyn Phillips. Triangulation pillar with 91.107m flush bracket height situated on the summit area at SH 39809 94701. Listing History: First published listing - The Welsh 30m - 99m Peaks published in 2004 on Geoff Crowder's v-g.me website and Mike Grant's 5everdene website and compiled by Myrddyn Phillips.
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Pen Bryn yr Eglwys81114262SH 29314 92444hand-held GPS via DoBIHc46SH 30115 92027interpolationc35Place Name Information: Hill name written as Penbrynyreglwys on the contemporary Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map. Listing History: First published listing - The Welsh 30m - 99m Peaks published in 2004 on Geoff Crowder's v-g.me website and Mike Grant's 5everdene website and compiled by Myrddyn Phillips.
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Ynys Lawd42.8114262SH 20224 82265Trimble GeoXH 600042.8N/AN/AN/APlace Name Information: Alternate hill name of South Stack also given on contemporary Ordnance Survey maps. Numerical Data: 42.8m summit height from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips. Listing History: First published listing - The Welsh 30m - 99m Peaks published in 2004 on Geoff Crowder's v-g.me website and Mike Grant's 5everdene website and compiled by Myrddyn Phillips.
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Ponciau Tre Wilmot76.6114262SH 22772 81657LIDARc39SH 21685 81120interpolationc38Place Name Information: Ponciau Tre Wilmot is a locally known name for this hill. Numerical Data: 76.6m summit height from LIDAR analysis conducted by Myrddyn Phillips. Listing History: First published listing - The Welsh 30m - 99m Peaks published in 2004 on Geoff Crowder's v-g.me website and Mike Grant's 5everdene website and compiled by Myrddyn Phillips.
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Yr Arwydd116.9114262SH 38800 82447Trimble GeoXH 6000c38SH 40939 83373interpolationc79The bounded land where the summit of this hill is situated is named Yr Arwydd on the Tithe map for the parish of Llechgynfarwy and which has been substantiated by local enquiry. 116.9m summit height from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips. Triangulation pillar with 116.924m flush bracket height situated on the summit area at SH 38823 82498.
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Cefn Cwmwd84.5114, 115263SH 43440 74193Trimble GeoXH 600036.3SH 42185 75141LIDAR48.3Numerical Data: 84.5m summit height from a Trimble GeoXH 6000 survey and 48.3m bwlch height (36.3m drop) from LIDAR analysis conducted by Myrddyn Phillips. Triangulation pillar with 83.774m flush bracket height situated on the summit area at SH 43300 74028. Listing History: First published listing - The Welsh 30m - 99m Peaks published in 2004 on Geoff Crowder's v-g.me website and Mike Grant's 5everdene website and compiled by Myrddyn Phillips.
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Pt. 88m88114262SH 31119 86934spot height36SH 32093 87850spot height52Numerical Data: 88m summit height and 52m bwlch height taken from the Ordnance Survey Vector Map Local hosted on the Geograph website and which is entitled the Interactive Coverage Map. Listing History: First published listing - The Welsh 30m - 99m Peaks published in 2004 on Geoff Crowder's v-g.me website and Mike Grant's 5everdene website and compiled by Myrddyn Phillips.
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Plas Gwyn76.1114, 115263SH 52494 81743Trimble GeoXH 600034.2SH 52209 81404LIDAR41.9Place Name Information: Plas Gwyn is a locally known name for this hill. Numerical Data: 76.1m summit height from a Trimble GeoXH 6000 survey and 41.9m bwlch height (34.2m drop) from LIDAR analysis conducted by Myrddyn Phillips. Listing History: First published listing - The Welsh 30m - 99m Peaks published in 2004 on Geoff Crowder's v-g.me website and Mike Grant's 5everdene website and compiled by Myrddyn Phillips.
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Llanlleiana Park68.2114262SH 38337 94993Trimble GeoXH 600034SH 38745 94536Trimble GeoXH 600034.2Place Name Information: The bounded land where the summit of this hill is situated is named Llanlleiana Park on the Tithe map for the parish of Amlwch. Numerical Data: 68.2m summit height and 34.2m bwlch height (34.0m drop) from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips. Listing History: First published listing - The Welsh 30m - 99m Peaks published in 2004 on Geoff Crowder's v-g.me website and Mike Grant's 5everdene website and compiled by Myrddyn Phillips.
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Pen Mynydd106.8114, 11517, 263SH 51454 74800Trimble GeoXH 600033.9SH 52054 76272LIDAR72.9106.8m summit height from a Trimble GeoXH 6000 survey and 72.9m bwlch height (33.9m drop) from LIDAR analysis conducted by Myrddyn Phillips. Triangulation pillar with 108.237m flush bracket height situated on the summit area at SH 51442 74802.
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Mynydd Bach96.5114262, 263SH 38964 76773Trimble GeoXH 6000c32SH 40259 77918interpolationc64Place Name Information: Mynydd Bach is a locally known name for this hill. Numerical Data: 96.5m summit height from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips. Listing History: First published listing - The Welsh 30m - 99m Peaks published in 2004 on Geoff Crowder's v-g.me website and Mike Grant's 5everdene website and compiled by Myrddyn Phillips.
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Barclodiau168.6114263SH 46674 84803Trimble GeoXH 600031.5SH 46583 85001LIDAR137.1168.6m summit height from a Trimble GeoXH 6000 survey and 137.1m bwlch height (31.5m drop) from LIDAR analysis conducted by Myrddyn Phillips
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Glan y Morfa59.2114, 115263SH 43819 67923LIDAR31.3SH 45679 69377LIDAR27.9Place Name Information: The bounded land where the summit of this hill is situated is named Glan y Morfa on the Tithe map for the parish of Llangeinwen. Numerical Data: 59.2m summit height and 27.9m bwlch height (31.3m drop) from LIDAR analysis conducted by Myrddyn Phillips. Listing History: First published listing - Update to the 30m - 99m Twmpau and Y Trechol - The Dominant Hills of Wales published in March 2021 on the Mapping Mountains site and compiled by Myrddyn Phillips.
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Clegyrog Ganol99114262SH 38569 89439spot heightc31SH 40950 89190interpolationc68The bounded land where the summit of this hill is situated is named Clegyrog Ganol on the Tithe map for the parish of Llanbadrig. 99m summit height taken from the spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which is entitled the Interactive Coverage Map.
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Pen y Castell168.9114263SH 46823 85324Trimble GeoXH 600030.9SH 46971 85430 LIDAR138.1168.9m summit height from a Trimble GeoXH 6000 survey and 138.1m bwlch height (30.9m drop) from LIDAR analysis conducted by Myrddyn Phillips, with LIDAR also giving a higher 138.2m bwlch position on the valley to valley traverse at SH 46993 85396 to a raised track which is considered a relatively recent man-made construct and therefore discounted from the drop value of this hill.
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Pen y Parc113.0114, 115263SH 59003 75009LIDAR30.1SH 58497 75660LIDAR82.8The bounded land where the summit of this hill is situated is named Pen y Parc on the Tithe map for the parish of Llandegfan. 113.0m summit height and 82.8m bwlch height (30.1m drop) from LIDAR analysis conducted by Myrddyn Phillips.
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Tyn Llan38.5114262SH 32709 82087LIDAR29.9SH 33264 82316LIDAR8.6The bounded land where the summit of this hill is situated is named Tyn Llan on the Tithe map for the parish of Llanllibio. 38.5m summit height and 8.6m bwlch height (29.9m drop) from LIDAR analysis conducted by Myrddyn Phillips.
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Pt. 86.4m86.4114263SH 48231 87520LIDAR29.4SH 47995 86997LIDAR57.086.4m summit height and 57.0m bwlch height (29.4m drop) from LIDAR analysis conducted by Myrddyn Phillips
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Tŷ Newydd35.65114262SH 30777 81080LIDAR29.3SH 31999 81570LIDAR6.3The bounded land where the summit of this hill is situated is named Tŷ Newydd on the Tithe map for the parish of Llanynghenedl. 35.65m summit height and 6.3m bwlch height (29.3m drop) from LIDAR analysis conducted by Myrddyn Phillips.
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Ty'nlôn97114262SH 32697 88754spot height29SH 32526 89419spot height68The bounded land where the summit of this hill is situated is named Ty'nlôn on the Tithe map for the parish of Llanrhuddlad. 97m summit height and 68m bwlch height (29m drop) taken from the spot heights that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which is entitled the Interactive Coverage Map.
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Tyddyn Gwydryn Llain Fan60.4114, 11517, 263SH 49584 68102LIDAR28.5SH 51324 71408LIDAR31.9The bounded land where the summit of this hill is situated is named Tyddyn Gwydryn Llain Fan on the Tithe map for the parish of Llanidan. 60.4m summit height and 31.9m bwlch height (28.5m drop) from LIDAR analysis conducted by Myrddyn Phillips.
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Pt. 63.3m63.3114, 115263SH 49157 76080Trimble GeoXH 600028.2SH 49043 76701LIDAR35.163.3m summit height from a Trimble GeoXH 6000 survey and 35.1m bwlch height (28.2m drop) from LIDAR analysis conducted by Myrddyn Phillips
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Plas Newydd100114, 115263SH 61430 80710spot height28SH 60600 81404LIDAR71.7The bounded land where the summit of this hill is situated is named Plas Newydd on the Tithe map for the parish of Llangoed. 100m summit height taken from the spot height that appears on the WalkLakes website. 71.7m bwlch height from LIDAR analysis conducted by Myrddyn Phillips.
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Penymorwydd70.5114262SH 38471 91255LIDARc28SH 38636 90826interpolationc4370.5m summit height from LIDAR analysis conducted by Myrddyn Phillips.
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Bonc y Garreg114.0114, 115263SH 48627 80418LIDAR26.9SH 48221 80516LIDAR87.1The bounded land where the summit of this hill is situated is named Bonc y Garreg on the Tithe map for the parish of Llanddyfnan. 114.0m summit height and 87.1m bwlch height (26.9m drop) from LIDAR analysis conducted by Myrddyn Phillips.
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Pen y Graig Wen94.3114263SH 44637 87986LIDAR26.1SH 45162 88579LIDAR68.2The bounded land where the summit of this hill is situated is named Pen y Graig Wen on the Tithe map for the parish of Llandyfrydog and Llan'l Tre' rbeirdd. 94.3m summit height and 68.2m bwlch height (26.1m drop) from LIDAR analysis conducted by Myrddyn Phillips.
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Tyn y Maes40.7114262SH 35484 93747LIDAR25.3SH 35494 93505LIDAR15.3The bounded land where the summit of this hill is situated is named Tyn y Maes on the Tithe map for the parish of Llanfechell. 40.7m summit height and 15.3m bwlch height (25.3m drop) from LIDAR analysis conducted by Myrddyn Phillips.
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Yr Hald105.8114263SH 45690 90596LIDAR25.2SH 45148 90730LIDAR80.65105.8m summit height and 80.65m bwlch height (25.2m drop) from LIDAR analysis conducted by Myrddyn Phillips.
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Cae Canol65.5114, 11517, 263SH 49886 70969LIDAR25.1SH 50115 71771LIDAR40.45The bounded land where the summit of this hill is situated is named Cae Canol on the Tithe map for the parish of Llanddaniel. 65.5m summit height and 40.45m bwlch height (25.1m drop) from LIDAR analysis conducted by Myrddyn Phillips.
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Pen y Cefn157114, 115263SH 57163 79686spot height25SH 58344 80453spot height132The bounded land where the summit of this hill is situated is named Pen y Cefn on the Tithe map for the parish of Llanddona.
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Allt Fawr42114262SH 34639 68534
triangulation pillar
25SH 34974 69389LIDAR17.0Triangulation pillar with 42.318m flush bracket height situated on the summit area. 17.0m bwlch height from LIDAR analysis conducted by Myrddyn Phillips.
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Tyn Llan29114262SH 32084 93367spot height25SH 32275 93087spot height4The bounded land where the summit of this hill is situated is named Tyn Llan on the Tithe map for the parish of Llanrhwydrys. 4m bwlch height taken from the spot height that appears on the interactive mapping on the Magic Maps website.
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Ynys y Fydlyn27114262SH 29050 91706spot heightc25SH 29128 91735interpolationc227m summit height taken from the spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which is entitled the Interactive Coverage Map.
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Menai Rock33.1114, 115263SH 55569 71697LIDAR24.1SH 55622 72078LIDAR9.0The bounded land where the summit of this hill is situated is named Menai Rock on the Tithe map for the parish of Llandysilio. 33.1m summit height and 9.0m bwlch height (24.1m drop) from LIDAR analysis conducted by Myrddyn Phillips.
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Llanol98114262SH 38057 88231
triangulation pillar
24SH 38310 88630spot height74Twin map heighted tops: The bounded land where the 98m triangulation pillar summit is situated is named Llanol and the bounded land where the twin summit is situated is named Fferam Isaf on the Tithe map for the parish of Llanbabo. The twin map heighted tops are to a 98m triangulation pillar with 99.739m flush bracket height positioned at SH 38057 88231 and 98m taken from the spot height positioned at SH 38425 88175 that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which is entitled the Interactive Coverage Map. 74m bwlch height (24m drop) taken from the spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which is entitled the Interactive Coverage Map.
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Yr Ogof92114262SH 35650 88879spot heightc24SH 37450 88739interpolationc68The bounded land where the summit of this hill is situated is named Yr Ogof on the Tithe map for the parish of Llanfechell.
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Pant y Gaseg72114262SH 41401 94065spot heightc24SH 41007 93863interpolationc48The bounded land where the summit of this hill is situated is named Pant y Gaseg on the Tithe map for the parish of Amlwch. 72m summit height taken from the spot height that appears on the MagicMaps and WalkLakes websites.
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Pt. 37.2m37.2114262SH 31399 78967LIDAR23.8SH 31873 78918 & SH 31791 78933LIDAR13.437.2m summit height and 13.4m bwlch height (23.8m drop) from LIDAR analysis conducted by Myrddyn Phillips, with LIDAR giving two positions of equal height for the bwlch.
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Cae Penorsedd33.5114262SH 30528 83481LIDAR23.65SH 30834 83544LIDAR9.9The bounded land where the summit of this hill is situated is named Cae Penorsedd on the Tithe map for the parish of Llanfwrog. 33.5m summit height and 9.9m bwlch height (23.65m drop) from LIDAR analysis conducted by Myrddyn Phillips.
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Mynydd Llwydiarth156.1114, 115263SH 54519 79147LIDAR23.5SH 54380 78960LIDAR132.6Summit is situated in the Pentraeth Forest. 156.1m summit height and 132.6m bwlch height (23.5m drop) from LIDAR analysis conducted by Myrddyn Phillips.
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Glantraeth35.6114262SH 30023 80722LIDAR23.4SH 30274 80755 & SH 30277 80755LIDAR12.15The bounded land where the summit of this hill is situated is named Glantraeth on the Tithe map for the parish of Llanynghenedl. 35.6m summit height and 12.15m bwlch height (23.4m drop) from LIDAR analysis conducted by Myrddyn Phillips, with LIDAR giving two positions of equal height for the bwlch at SH 30274 80755 and SH 30277 80755.
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Graianfryn45.4114262SH 32558 83967LIDAR23.2SH 33278 84232LIDAR22.2The bounded land where the summit of this hill is situated is named Graianfryn on the Tithe map for the parish of Llanfigel. 45.4m summit height and 22.2m bwlch height (23.2m drop) from LIDAR analysis conducted by Myrddyn Phillips. Triangulation pillar with 44.037m flush bracket height situated on the summit area at SH 32555 83917.
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Arw Fawr30.9114262SH 31485 81608LIDAR23.15SH 31747 81483LIDAR7.8The bounded land where the summit of this hill is situated is named Arw Fawr on the Tithe map for the parish of Llanynghenedl. 30.9m summit height and 7.8m bwlch height (23.15m drop) from LIDAR analysis conducted by Myrddyn Phillips.
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Foel141114262SH 30558 89859spot heightc23SH 31026 90339interpolationc118The bounded land where the summit of this hill is situated is named Foel on the Tithe map for the parish of Llanrhuddlad.
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Teilia51114262SH 38125 94148spot heightc23SH 38469 94108interpolationc28The bounded land where the summit of this hill is situated is named Teilia on the Tithe map for the parish of Llanbadrig. 51m summit height taken from the spot height that appears on the interactive mapping on the Magic Maps website.
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Dinas30114262SH 22280 79406spot heightc23SH 22248 79489interpolationc730m summit height taken from the spot height that appears on the interactive mapping on the Magic Maps website.
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Pt. 27.4m27.4114262SH 31929 76427LIDAR22.4SH 31835 76966LIDAR5.027.4m summit height and 5.0m bwlch height (22.35m drop) from LIDAR analysis conducted by Myrddyn Phillips.
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Mynydd y Wylfa39.7114262SH 35676 94469LIDAR22.3SH 35423 94228LIDAR17.539.7m summit height and 17.5m bwlch height (22.3m drop) from LIDAR analysis conducted by Myrddyn Phillips.
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Pt. 30.8m30.8114262SH 29675 84885LIDAR22.1SH 29963 84611LIDAR8.730.8m summit height and 8.7m bwlch height (22.1m drop) from LIDAR analysis conducted by Myrddyn Phillips.
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Tŷ Canol166114263SH 47141 90737spot height22SH 40787 91141spot height144The bounded land where the summit of this hill is situated is named Tŷ Canol on the Tithe map for the parish of Llaneilian. 166m summit height taken from the spot height that appears on the Magic Maps website and 144m bwlch height (22m drop) taken from the spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which is entitled the Interactive Coverage Map.
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Rhuddlan Fawr114114, 115263SH 48673 81249
triangulation pillar
22SH 48784 81428 & SH 48697 81460spot height92The bounded land where the summit of this hill is situated is named Rhuddlan Fawr on the Tithe map for the parish of Llanfairmathafarn Eithaf. Triangulation pillar with 114.674m flush bracket height situated on the summit area. There are two options for the position of the critical bwlch; 92m (1:50,000 Landranger) at SH 48784 81428 and 92m (Vector Map Local on Geograph website) at SH 48697 81460.
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Bodowen63.4114262, 263SH 37608 66991LIDAR22SH 39614 69511spot height41The bounded land where the summit of this hill is situated is named Bodowen on the Tithe map for the parish of Llangadwaladr and Llanfeirian. 63.4m summit height from LIDAR analysis conducted by Myrddyn Phillips. 41m bwlch height taken from the spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which is entitled the Interactive Coverage Map.
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Mynydd Twr163114262SH 21403 82754spot heightc22SH 21513 82838interpolationc141This hill is a part of the land comprising Mynydd Twr. 163m summit height taken from the spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which is entitled the Interactive Coverage Map.
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Glan yr Afon129114, 115263SH 55815 79322spot heightc22SH 56143 78764interpolationc107The bounded land where the summit of this hill is situated is named Glan yr Afon on the Tithe map for the parish of Llanddona. 129m summit height taken from the spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which is entitled the Interactive Coverage Map.
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Mynydd Mwyn101114, 115262SH 40983 82338spot heightc22SH 40939 83375interpolationc79The bounded land where the summit of this hill is situated is named Mynydd Mwyn on the Tithe map for the parish of Gwredog.
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Cemaes Fawr55.9114262SH 37927 92898 & SH 37925 92896 & SH 37927 92896LIDARc22SH 38185 93111interpolationc34The bounded land where the summit of this hill is situated is named Cemaes Fawr on the Tithe map for the parish of Llanbadrig. 55.9m summit height from LIDAR analysis conducted by Myrddyn Phillips, with LIDAR giving three positions of equal height for the summit.
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Ynysoedd y Moelrhoniaid21.7114262SH 26777 94759Trimble GeoXH 600021.7N/AN/AN/AAlternate hill name of The Skerries also given on contemporary Ordnance Survey maps. 21.7m summit height from a Trimble GeoXH 6000 survey conducted by Myrddyn Phillips.
83
Tan y Bryn25.1114262SH 32145 73399LIDAR21.3SH 32945 73411LIDAR3.8The bounded land where the summit of this hill is situated is named Tan y Bryn on the Tithe map for the parish of Llanfaelog. 25.1m summit height and 3.8m bwlch height (21.3m drop) from LIDAR analysis conducted by Myrddyn Phillips.
84
Din Dryfol65.15114262, 263SH 39603 72469LIDAR21.1SH 39640 72534LIDAR44.065.15m summit height and 44.0m bwlch height (21.1m drop) from LIDAR analysis conducted by Myrddyn Phillips.
85
Pen Ucheldref133114, 115263SH 55805 77334spot height21SH 57062 78438spot height112The bounded land where the summit of this hill is situated is named Pen Ucheldref on the Tithe map for the parish of Llansadwrn.
86
Y Werthyr63114262SH 36311 84342spot height21SH 36670 83487spot height4242m bwlch height taken from the spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which is entitled the Interactive Coverage Map and appears on the Ordnance Survey 1:50,000 Landranger map.
87
Pen yr Orsedd44114262SH 32516 92447spot heightc21SH 32408 92169interpolationc23The bounded land where the summit of this hill is situated is named Pen yr Orsedd on the Tithe map for the parish of Llanrhwydrys.
88
Cae Mawr25.1114262SH 29051 83437LIDAR20.9SH 29254 83269LIDAR4.2The bounded land where the summit of this hill is situated is named Cae Mawr on the Tithe map for the parish of Llanfwrog. 25.1m summit height and 4.2m bwlch height (20.9m drop) from LIDAR analysis conducted by Myrddyn Phillips.
89
Dinas97.5114, 11517, 263SH 55156 73422LIDAR20.8SH 55132 73663LIDAR76.797.5m summit height and 76.7m bwlch height (20.8m drop) from LIDAR analysis conducted by Myrddyn Phillips.
90
Castell Mawr44.4114, 115263SH 53086 81548LIDAR20.8SH 52978 81474LIDAR23.644.4m summit height and 23.6m bwlch height (20.8m drop) from LIDAR analysis conducted by Myrddyn Phillips.
91
Cafnan41.8114262SH 34714 92915LIDAR20.7SH 34936 92892LIDAR21.1The bounded land where the summit of this hill is situated is named Cafnan on the Tithe map for the parish of Llanfechell. 41.8m summit height and 21.1m bwlch height (20.7m drop) from LIDAR analysis conducted by Myrddyn Phillips.
92
Foel Fawr48.9114262SH 35728 91981LIDAR20.6SH 35963 91346LIDAR28.348.9m summit height and 28.3m bwlch height (20.6m drop) from LIDAR analysis conducted by Myrddyn Phillips.
93
Pt. 39.7m39.7114262SH 29920 85948LIDAR20.5SH 30092 86343LIDAR19.239.7m summit height and 19.2m bwlch height (20.5m drop) from LIDAR analysis conducted by Myrddyn Phillips.
94
Ynys Llanddwyn21.8114263SH 38841 62953LIDAR20.3SH 39107 63441 & SH 39099 63431LIDAR1.521.8m summit height and 1.5m bwlch height (20.3m drop) from LIDAR analysis conducted by Myrddyn Phillips, with LIDAR giving two positions of equal height for the bwlch.
95
Bryn Ifan43.4114262SH 33612 70347LIDAR20.2SH 35753 72013LIDAR23.243.4m summit height and 23.2m bwlch height (20.2m drop) from LIDAR analysis conducted by Myrddyn Phillips.
96
Cerrig Engan71.8114, 115262, 263SH 40381 73301LIDAR20SH 40471 73329LIDAR51.8The bounded land where the summit of this hill is situated is named Cerrig Engan on the Tithe map for the parish of Aberffraw. 71.8m summit height and 51.8m bwlch height (20.0m drop) from LIDAR analysis conducted by Myrddyn Phillips.
97
Rhwng Dau Fynydd42.0114262SH 35146 92985LIDAR20.0SH 35426 92899LIDAR22.0The bounded land where the summit of this hill is situated is named Rhwng Dau Fynydd on the Tithe map for the parish of Llanfechell. 42.0m summit height and 22.0m bwlch height (20.0m drop) from LIDAR analysis conducted by Myrddyn Phillips.
98
Cae'r Hafod38114262SH 23732 80023spot height20SH 23844 80805spot height18The bounded land where the summit of this hill is situated is named Cae'r Hafod on the Tithe map for the parish of Holyhead. 38m summit height and 18m bwlch height (20m drop) taken from the spot heights that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which is entitled the Interactive Coverage Map.
99
Pt. 32m32114262SH 28120 75648spot height20SH 27589 76108LIDAR11.911.9m bwlch height from LIDAR analysis conducted by Myrddyn Phillips.
100
Bwlch y Fen & Tyddyn Gwyn
88.15114, 115262, 263SH 41738 78329LIDARc20SH 41140 80401interpolationc68The bounded land where the summit of this hill is situated is named Bwlch y Fen & Tyddyn Gwyn on the Tithe map for the parish of Heneglwys. 88.15m summit height from LIDAR analysis conducted by Myrddyn Phillips.