Mapping Mountains – Significant Name Changes – Y Trichant – The 300m Hills of Wales

Pen y Ffrwd Lwyd (SN 709 687) 

There has been a Significant Name Change 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. 

LIDAR image of Pen y Ffrwd Lwyd (SN 709 687)

The criteria for the list that this name change 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. 

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

The hill is adjoined to the Elenydd group of hills, which are situated in the central part of the Mid and West Wales Region (Region B, Sub-Region B2), and it is positioned with the B4340 road to its south-west and a minor road to its east, and has the small community of Ystradmeurig towards the south south-west. 

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

When the original 300m height band of Welsh P30 hills were published on Geoff Crowder’s v-g.me website, this hill was listed under the name of Craig Ystradmeurig, which is a prominent name that appears near the summit of this hill on the contemporary Ordnance Survey 1:50,000 Landranger and 1:25,000 Explorer map, but which is more applicable to a 318m map heighted hill towards the west.

Craig Ystradmeurig

342m

SN709687

135/147

213

 

Since publication of these P30 lists on Geoff Crowder’s v-g.me website there have been a number of Ordnance Survey 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 are current and digitally updated such as the old Vector Map Local hosted on the Geograph website and which was entitled the Interactive Coverage Map, and the interactive mapping on the Magic Maps and WalkLakes websites, and it is the Ordnance Survey series of Six-Inch maps that give the name of Pen y Ffrwd Lwyd adjacent to the summit of this hill, with this name also appearing on the Ordnance Survey 1:25,000 Explorer map. 

Extract from the Ordnance Survey series of Six-Inch maps

Therefore, the name this hill is now listed by in the Y Trichant – The 300m Hills of Wales is Pen y Ffrwd Lwyd and this was derived from the Ordnance Survey 1:25,000 Explorer map with the name placement substantiated from the Ordnance Survey series of Six-Inch maps. 

 

The full details for the hill are: 

Group:  Elenydd 

Name:  Pen y Ffrwd Lwyd 

Previously Listed Name:  Craig Ystradmeurig 

OS 1:50,000 map:  135, 147

Summit Height:  340.6m (LIDAR)                                                           

Summit Grid Reference:  SN 70911 68747 (LIDAR) 

Bwlch Height:  311.6m (LIDAR) 

Bwlch Grid Reference:  SN 71167 69418 (LIDAR) 

Drop:  29.0m (LIDAR) 

 

Myrddyn Phillips (December 2021)