Mapping Mountains - Hill Reclassifications - Y Trichant - The 300m Hills of Wales

 

Y Trichant - The 300m of Wales – Hill Reclassifications

Y Trichant - The 300m Hills of Wales are the Welsh hills at or above 300m and below 40om in height that have a minimum drop of 30m.  With these hills forming the 300m height band within the listing of the Twmpau (an acronym standing for thirty welsh metre prominences and upward).  Accompanying the main P30 list is a sub list entitled the 300m Sub-Trichant, with the criteria for this sub category being all Welsh hills at or above 300m and below 400m in height with 20m or more and below 30m of drop.  The Introduction to this list giving its publication history appeared on Mapping Mountains on 13.05.17.

The list is authored by Myrddyn Phillips and the posts that have appeared on Mapping Mountains detailing the additions, reclassifications and deletions to the main P30 list and the sub list appear below presented chronologically in receding order.

Mapping Mountains - Hill Reclassifications - Y Trichant - The 300m Hills of Wales

Coed Llwyn Owen (SN 703 402) – Sub-Trichant deletion (252nd reclassification)

Significant Height Revisions post for Coed Llwyn Owen

There has been a deletion from the list of the Y Trichant – The 300m Hills of Wales, with the summit height, bwlch height and their locations, the drop and status of the hill derived from LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Coed Llwyn Owen (SN 703 402)

The criteria for the list that this deletion applies to are:

Y Trichant – The 300m Hills of Wales – Welsh hills at or above 300m and below 400m in height that have 30m minimum drop, with an accompanying sub list entitled the Sub-Trichant, with the criteria for this sub category being all Welsh hills at or above 300m and below 400m in height with 20m or more and below 30m of drop.  The list is authored by Myrddyn Phillips with the Introduction to the list and the renaming of it appearing on Mapping Mountains on the 13^th May 2017, and the Introduction to the Mapping Mountains publication of the list appearing on the 1^st January 2022. 

Y Trichant - The 300m Hills of Wales by Myrddyn Phillips

The name the hill is listed by is Coed Llwyn Owen, and it is adjoined to the Mynydd Mallaen group of hills, which are situated in the central part of South Wales (Region B, Sub-Region B1), and it is positioned with a minor road to its south and the A482 road farther to its south-west, and has the town of Llanymddyfri (Llandovery) towards the south-east.

When the original 300m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website, this hill was not included in the accompanying Hills to be surveyed sub list, as it was considered not to meet the criteria then used for this sub category.

After the sub list was standardised, and interpolated heights and drop values also included the details for this hill were re-evaluated and it was listed with an estimated c 20m of drop, based on the 346m summit spot height that appears on the Ordnance Survey 1:25,000 Explorer map and an estimated c 326m bwlch height, based on interpolation of 10m contouring between 320m – 330m. 

Extract from the Ordnance Survey 1:25,000 Explorer map

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales.

Therefore, the deletion of this hill from Sub-Trichant status is due to LIDAR analysis, resulting in a 341.5m summit height and a 328.8m bwlch height, with these values giving this hill 12.7m of drop, which is insufficient for it to be classified as a Sub-Trichant.

 

The full details for the hill are: 

Group:  Mynydd Mallaen 

Name:  Coed Llwyn Owen 

OS 1:50,000 map:  146, 147, 160

Summit Height:  341.5m (LIDAR)                                                           

Summit Grid Reference:  SN 70382 40288 (LIDAR) 

Bwlch Height:  328.8m (LIDAR) 

Bwlch Grid Reference:  SN 70456 40324 (LIDAR) 

Drop:  12.7m (LIDAR) 

 

Myrddyn Phillips (November 2025) 

Mapping Mountains - Hill Reclassifications - Y Trichant - The 300m Hills of Wales

Craig Cefn Llech (SN 952 771) – Sub-Trichant addition (251st reclassification)

There has been confirmation of an addition to the list of Y Trichant – The 300m Hills of Wales, with the summit height, bwlch height and their locations, the drop and status of the hill derived from LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Craig Cefn Llech (SN 952 771)

The criteria for the list that this addition applies to are:

Y Trichant – The 300m Hills of Wales – Welsh hills at or above 300m and below 400m in height that have 30m minimum drop, with an accompanying sub list entitled the Sub-Trichant, with the criteria for this sub category being all Welsh hills at or above 300m and below 400m in height with 20m or more and below 30m of drop.  The list is authored by Myrddyn Phillips with the Introduction to the list and the renaming of it appearing on Mapping Mountains on the 13^th May 2017, and the Introduction to the Mapping Mountains publication of the list appearing on the 1^st January 2022. 

Y Trichant - The 300m Hills of Wales by Myrddyn Phillips

The name the hill is listed by is Craig Cefn Llech, and it is adjoined to the Hirddywel group of hills, which are situated in the northern part of South Wales (Region B, Sub-Region B2), and it is positioned with a minor road to its south, the A470 road to its west and the B4518 road to its east, and has the town of Llanidloes towards the north.

When the original 300m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website, this hill was not included in the accompanying Hills to be surveyed sub list, as it was considered not to meet the criteria then used for this sub category.

After the sub list was standardised, and interpolated heights and drop values also included the details for this hill were re-evaluated and it was listed with 23m of drop, based on the 398m summit spot height and the 375m bwlch spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map. 

Extract from the Ordnance Survey 1:25,000 Explorer map

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales.

Therefore, the confirmation of the addition of this hill to Sub-Trichant status is due to LIDAR analysis, resulting in a 396.8m summit height and a 374.3m bwlch height, with these values giving this hill 22.5m of drop, which is sufficient for it to be classified as a Sub-Trichant.

 

The full details for the hill are: 

Group:  Hirddywel 

Name:  Craig Cefn Llech 

OS 1:50,000 map:  136, 147

Summit Height:  396.8m (LIDAR)                                                           

Summit Grid Reference:  SN 95276 77143 (LIDAR) 

Bwlch Height:  374.3m (LIDAR) 

Bwlch Grid Reference:  SN 95176 77563 (LIDAR) 

Drop:  22.5m (LIDAR) 

 

Myrddyn Phillips (September 2025)

Mapping Mountains - Hill Reclassifications - Y Trichant - The 300m Hills of Wales

Cefn Uchaf (SN 958 800) – Trichant reclassified to Sub-Trichant (250th reclassification)

Survey post for Cefn Uchaf

Summit Relocations post for Cefn Uchaf

Significant Name Changes post for Cefn Uchaf

There has been confirmation of a reclassification to a hill that is listed in the Y Trichant – The 300m Hills of Wales, with the summit height, bwlch height and their locations, the drop and status of the hill derived from LIDAR analysis conducted by Myrddyn Phillips. 

LIDA image of Cefn Uchaf (SN 958 800)

The criteria for the list that this reclassification applies to are:

Y Trichant – The 300m Hills of Wales – Welsh hills at or above 300m and below 400m in height that have 30m minimum drop, with an accompanying sub list entitled the Sub-Trichant, with the criteria for this sub category being all Welsh hills at or above 300m and below 400m in height with 20m or more and below 30m of drop.  The list is authored by Myrddyn Phillips with the Introduction to the list and the renaming of it appearing on Mapping Mountains on the 13^th May 2017, and the Introduction to the Mapping Mountains publication of the list appearing on the 1^st January 2022. 

Y Trichant - The 300m Hills of Wales by Myrddyn Phillips

The name the hill is now listed by is Cefn Uchaf, and this was derived from the Tithe map, and it is adjoined to the Hirddywel group of hills, which are situated in the northern part of South Wales (Region B, Sub-Region B2), and it is positioned with minor roads to its north, west and south, with the A470 road farther to its north-west and the B4518 road farther to its east, and has the town of Llanidloes towards the north.

When the original 300m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website, this hill was included in the accompanying Hills to be surveyed sub list, as it was considered not to meet the criteria then used for the main P30 list. 

Extract from the Ordnance Survey 1:25,000 Explorer map

After the sub list was standardised, and interpolated heights and drop values also included the details for this hill were re-evaluated and it was listed with 30m of drop, based on the 358m summit spot height and the 328m bwlch spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map.

However, it was not until a Trimble GeoXH 6000 survey and subsequent LIDAR analysis that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales.

Therefore, the confirmation of the reclassification of this hill to Sub-Trichant status is due to LIDAR analysis, resulting in a 357.7m summit height and a 329.3m bwlch height, with these values giving this hill 28.4m of drop, which is insufficient for it to be classified as a Trichant. 

 

The full details for the hill are: 

Group:  Hirddywel 

Name:  Cefn Uchaf 

OS 1:50,000 map:  136

Summit Height:  357.7m (LIDAR)                                                           

Summit Grid Reference:  SN 95819 80021 (LIDAR) 

Bwlch Height:  329.3m (LIDAR) 

Bwlch Grid Reference:  SN 95421 80193 (LIDAR) 

Drop:  28.4m (LIDAR) 

 

Myrddyn Phillips (September 2025) 

Mapping Mountains - Hill Reclassifications - Y Trichant - The 300m Hills of Wales

Murgwyn (SH 351 442) – Sub-Trichant reclassified to 200m Sub-Twmpau (249th reclassification)

There has been a reclassification of a hill from the list of Y Trichant – The 300m Hills of Wales to the list of 200m Twmpau with the summit height, bwlch height and their locations, the drop and status of the hill derived from LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Murgwyn (SH 351 442)

The criteria for the two listings that this reclassification applies to are:

Y Trichant – The 300m Hills of Wales – Welsh hills at or above 300m and below 400m in height that have 30m minimum drop, with an accompanying sub list entitled the Sub-Trichant, with the criteria for this sub category being all Welsh hills at or above 300m and below 400m in height with 20m or more and below 30m of drop.  The list is authored by Myrddyn Phillips with the Introduction to the list and the renaming of it appearing on Mapping Mountains on the 13^th May 2017, and the Introduction to the Mapping Mountains publication of the list appearing on the 1^st January 2022. 

Y Trichant - The 300m Hills of Wales by Myrddyn Phillips

200m Twmpau – Welsh hills at or above 200m and below 300m in height that have 30m minimum drop, with an accompanying sub list entitled the 200m Sub-Twmpau, with the criteria for this sub category being all Welsh hills at or above 200m and below 300m in height with 20m or more and below 30m of drop.  The list is authored by Myrddyn Phillips, with the word Twmpau being an acronym standing for thirty welsh metre prominences and upward. 

200m Twmpau by Myrddyn Phillips

The name the hill is listed by is Murgwyn, and this was derived from local enquiry, and it is adjoined to the Yr Eifl group of hills, which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and it is positioned with a minor road to its south-east and the B4417 road to its south, and has the village of Llithfaen towards the south south-east.

When the original 300m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website, this hill was included in the Hills to be surveyed sub list that accompanied the main P30 list, with a summit height os 300m, based on the spot height that appears on the Ordnance Survey 1:25,000 Explorer map, with an accompanying note stating; 302m on 1984 1:50000 map. 

Extract from the Ordnance Survey 1:25,000 Explorer map

When the sub list was standardised, and interpolated heights and drop values also included the details for this hill were re-evaluated and it was listed with 28m of drop, based on the aforementioned 302m summit spot height and the 274m bwlch spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map. 

Extract from the Ordnance Survey 1:50,000 Landranger map

Since the original publication of the Welsh P30 lists on Geoff Crowder’s v-g.me website there have been a number of maps made available online.  Some of these are historic such as the series of Six-Inch maps on the National Library of Scotland website.  Whilst others were digitally updated such as the Ordnance Survey Vector Map Local that was hosted on the Geograph website and which was entitled the Interactive Coverage Map, whilst others are current and digitally updated such as the interactive mapping on the Magic Maps and WalkLakes websites.

One of the mapping resources now available online is the WalkLakes website which hosts an interactive map originated from the Ordnance Survey Open Data programme.  This map has many spot heights not on other publicly available maps and for this hill a 299m spot height is given on its summit area. 

Extract from the interactive mapping hosted on the WalkLakes website

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales.

Therefore, the reclassification of this hill to 200m Sub-Twmpau status is due to LIDAR analysis, resulting in a 298.8m summit height and a 273.5m bwlch height, with these values giving this hill 25.3m of drop, with its height insufficient for it to be classified as a Sub-Trichant. 

 

The full details for the hill are: 

Group:  Yr Eifl 

Name:  Murgwyn 

OS 1:50,000 map:  123

Summit Height:  298.8m (LIDAR)                                                           

Summit Grid Reference:  SH 35132 44223 (LIDAR) 

Bwlch Height:  273.5m (LIDAR) 

Bwlch Grid Reference:  SH 35281 44017 (LIDAR) 

Drop:  25.3m (LIDAR) 

 

Myrddyn Phillips (August 2025)

Mapping Mountains - Hill Reclassifications - Y Trichant - The 300m Hills of Wales

Tirlenwiad Bryn Posteg (SN 971 820) and Pt. 344.4m (SN 970 825) – Dual Summit Sub-Trichant addition (248th reclassification)

Significant Height Revisions post for Tirlenwiad Bryn Posteg

Summit Relocations post for Tirlenwiad Bryn Posteg

Significant Name Changes post for Tirlenwiad Bryn Posteg

There has been a Dual Summit addition to the list of the Y Trichant – The 300m Hills of Wales, with the summit height, bwlch height and their locations, the drop and status of the hill derived from LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Pt. 344.4m (SN 970 825) and Tirlenwiad Bryn Posteg (SN 971 820)

The criteria for the list that this addition applies to are:

Y Trichant – The 300m Hills of Wales – Welsh hills at or above 300m and below 400m in height that have 30m minimum drop, with an accompanying sub list entitled the Sub-Trichant, with the criteria for this sub category being all Welsh hills at or above 300m and below 400m in height with 20m or more and below 30m of drop.  The list is authored by Myrddyn Phillips with the Introduction to the list and the renaming of it appearing on Mapping Mountains on the 13^th May 2017, and the Introduction to the Mapping Mountains publication of the list appearing on the 1^st January 2022. 

Y Trichant - The 300m Hills of Wales by Myrddyn Phillips

Dual Summit hills:

A hill classified as a Dual Summit is defined as one which has an extant natural summit coupled with that of a higher artificial summit, with the latter that can be described as stable in character.  In the main, these recent man-made constructions are the result of quarrying activities producing spoil tips, or as in this instance a landfill.  These recent man-made constructions are treated differently to ancient man-made constructions such as hill forts and tumuli, as if the latter are deemed stable and of an earthen character their age dictates that they can be viewed as being permanent in nature and are now effectively a part of the hill.  For those bagging Dual Summit hills, a visit to either the natural high point or the elevated man-made high point is sufficient to claim an ascent of the hill.  With the Dual Summit classification being a relatively new category and fist instigated in January 2018 for a Dual Summit Pedwar.

The name the hill is now listed by is 344.4m for the lower natural summit and Tirlenwiad Bryn Posteg for the higher man-made summit, and it is adjoined to the Hirddywel group of hills, which are situated in the northern part of South Wales (Region B, Sub-Region B2), and it is positioned with minor roads to its north-east and south-east, and the B4518 road to its south-west, and has the town of Llanidloes towards the north-west. 

When the original 300m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website, this hill was not included in the accompanying Hills to be surveyed sub list, as it was considered not to meet the criteria then used for this sub category.

Extract from the Ordnance Survey 1:25,000 Explorer map

After the sub list was standardised, and interpolated heights and drop values also included the details for this hill were re-evaluated and it was listed with an estimated c 26m of drop, based on the 345m summit spot height that appeared on the Ordnance Survey Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map and an estimated c 319m bwlch height, based on interpolation of 10m contouring between 310m – 320m.

However, it was not until LIDAR became available that the details for these summits could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales.

Therefore, the addition of this hill to Dual Summit Sub-Trichant status is due to LIDAR analysis, resulting in a 344.4m summit height for the natural summit and a 351.9m summit height for the man-made summit, and a 331.0m bwlch height, with these values giving the natural summit 13.4m of drop and the man-made summit 20.9m of drop, with the details for the higher summit prioritised within the list. 

 

The full details for the hill are:

Group:  Hirddywel

Name:  344.4m (natural Dual Summit) and Tirlenwiad Bryn Posteg (artificial Dual Summit)

OS 1:50,000 map:  136

Summit Height:  344.4m (natural Dual Summit) (LIDAR) and 351.9m (artificial Dual Summit (LIDAR)

Summit Grid Reference:  SN 97023 82535 (natural Dual Summit) (LIDAR) and SN 97109 82092 & SN 97114 82098 (artificial Dual Summit) (LIDAR)

Bwlch Height:  331.0m (LIDAR)

Bwlch Grid Reference:  SN 97021 81849 (LIDAR)

Drop:  13.4m (natural Dual Summit) (LIDAR) and 20.9m (artificial Dual Summit) (LIDAR)

 

Myrddyn Phillips (July 2025)

Mapping Mountains - Hill Reclassifications - Y Trichant - The 300m Hills of Wales

Hafoty Glan y Bala (SH 587 610) – Sub-Trichant addition (247th reclassification)

Significant Name Changes post for Hafoty Glan y Bala

There has been an addition to the list of Y Trichant – The 300m Hills of Wales, with the summit height, bwlch height and their locations, the drop and status of the hill derived from LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Hafoty Glan y Bala (SH 587 610)

The criteria for the list that this addition applies to are:

Y Trichant – The 300m Hills of Wales – Welsh hills at or above 300m and below 400m in height that have 30m minimum drop, with an accompanying sub list entitled the Sub-Trichant, with the criteria for this sub category being all Welsh hills at or above 300m and below 400m in height with 20m or more and below 30m of drop.  The list is authored by Myrddyn Phillips with the Introduction to the list and the renaming of it appearing on Mapping Mountains on the 13^th May 2017, and the Introduction to the Mapping Mountains publication of the list appearing on the 1^st January 2022. 

Y Trichant - The 300m Hills of Wales by Myrddyn Phillips

The name the hill is listed by is Hafoty Glan y Bala, and this was derived from the Tithe map, and it is adjoined to the Glyder Fawr group of hills, which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and it is positioned with minor roads to its north-west and east, the A4086 road to its south-west, and has the village of Llanberis towards the south-west.

When the original 300m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website, this hill was not included in the accompanying Hills to be surveyed sub list, as with a 313m summit spot height on the contemporary Ordnance Survey 1:25,000 Explorer map and with no significant bwlch contours of note it was difficult to know whether any hill of note existed.

Current online Ordnance Survey mapping now shows bwlch contouring between 285m – 290m, with interpolation placing the height at an estimated c 289m and when coupled with the 313m summit spot height, these values give this hill an estimated c 24m of drop. 

Extract from the Ordnance Survey 1:25,000 Explorer map

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales.

Therefore, the addition of this hill to Sub-Trichant status is due to LIDAR analysis, resulting in a 313.2m summit height and a 288.2m bwlch height, with these values giving this hill 25.0m of drop, which is sufficient for it to be classified as a Sub-Trichant. 

 

The full details for the hill are: 

Group:  Glyder Fawr 

Name:  Hafoty Glan y Bala 

OS 1:50,000 map:  114, 115

Summit Height:  313.2m (LIDAR)                                                           

Summit Grid Reference:  SH 58760 61016 (LIDAR) 

Bwlch Height:  288.2m (LIDAR) 

Bwlch Grid Reference:  SH 58906 60906 (LIDAR) 

Drop:  25.0m (LIDAR) 

 

Myrddyn Phillips (June 2025)

Mapping Mountains - Hill Reclassifications - Y Trichant - The 300m Hills of Wales

Matilda (SH 595 603) – Sub-Trichant addition (246th reclassification)

Significant Height Revisions post for Matilda

There has been an addition to the list of Y Trichant – The 300m Hills of Wales, with the summit height, bwlch height and their locations, the drop and status of the hill derived from LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Matilda (SH 595 603)

The criteria for the list that this addition applies to are:

Y Trichant – The 300m Hills of Wales – Welsh hills at or above 300m and below 400m in height that have 30m minimum drop, with an accompanying sub list entitled the Sub-Trichant, with the criteria for this sub category being all Welsh hills at or above 300m and below 400m in height with 20m or more and below 30m of drop.  The list is authored by Myrddyn Phillips with the Introduction to the list and the renaming of it appearing on Mapping Mountains on the 13^th May 2017, and the Introduction to the Mapping Mountains publication of the list appearing on the 1^st January 2022. 

Y Trichant - The 300m Hills of Wales by Myrddyn Phillips

The name the hill is listed by is Matilda, and it is adjoined to the Glyder Fawr group of hills, which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and it is positioned with the A4086 road to its south-west, and has the village of Llanberis towards the west south-west.

When the original 300m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website, this hill was not included in the accompanying Hills to be surveyed sub list, as with no significant contours of note on the Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map it was difficult to know whether any hill of note existed. 

Extract from the Ordnance Survey 1:25,000 Explorer map

Since the original publication of the Welsh P30 lists on Geoff Crowder’s v-g.me website there have been a number of maps made available online.  Some of these are historic such as the series of Six-Inch maps on the National Library of Scotland website.  Whilst others were digitally updated such as the Ordnance Survey Vector Map Local that was hosted on the Geograph website and which was entitled the Interactive Coverage Map, whilst others are current and digitally updated such as the interactive mapping on the Magic Maps and WalkLakes websites.

Another resource now available online is the interactive mapping hosted on the Welsh Government website and entitled the DataMapWales.  This mapping has 5m contours and its detail matches that produced from the OS Terrain 5 product, which compliments much of that produced from LIDAR.  Using this map the details for the hill were subsequently documented as an estimated c 17m of drop, based on an estimated c 355m summit height and an estimated c 338m bwlch height, with both heights based on interpolation of 5m contouring. 

Extract from the DataMapWales

However, it was not until LIDAR became available that the details for this hill could be accurately re-assessed.  The LIDAR (Light Detection & Ranging) technique produced highly accurate height data that is now freely available for much of England and Wales.

Therefore, the addition of this hill to Sub-Trichant status is due to LIDAR analysis, resulting in a 357.0m summit height and a 336.8m bwlch height, with these values giving this hill 20.1m of drop, which is sufficient for it to be classified as a Sub-Trichant. 

 

The full details for the hill are: 

Group:  Glyder Fawr 

Name:  Matilda 

OS 1:50,000 map:  115

Summit Height:  357.0m (LIDAR)                                                           

Summit Grid Reference:  SH 59592 60356 (LIDAR) 

Bwlch Height:  336.8m (LIDAR) 

Bwlch Grid Reference:  SH 59620 60349 (LIDAR) 

Drop:  20.1m (LIDAR) 

 

Myrddyn Phillips (June 2025)