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

Cefn Penarth (SN 924 853)

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 initially confirmed by Joe Nuttall who produced a summit analysis programme using LIDAR, and then by LIDAR analysis initially conducted by Jim Bloomer and subsequently by Myrddyn Phillips, with the hill previously surveyed with the Trimble GeoXH 6000.

LIDAR image of Cefn Penarth (SN 924 853)

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 13th May 2017.

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

The hill is adjoined to the Pumlumon group of hills, which are situated in the north-western part of Mid and West Wales (Region B, Sub-Region B2), and it is positioned between the river valleys of the Afon Clewedog to its north and the Afon Hafren (River Severn) to its south, and has a minor road running the length of its ridge and the B4518 road to its north-east, and has the town of Llanidloes towards the east south-east.

The hill appeared in the original Welsh 300m P30 list on Geoff Crowder’s v-g.me website under the partly invented and transposed name of Mynydd Cefn-penarth, with an accompanying note stating; Name from buildings to the North-East and North-West.

Mynydd Cefn-penarth

317m

SN925854

136

214

Name from buildings to the North-East and North-West

During my early hill listing I thought it appropriate to either invent a name for a hill, or use a name that appeared near to the summit of the hill on Ordnance Survey maps of the day.  My preference was to use farm names and put Pen, Bryn or Moel in front of them or as in this instance put the word Mynydd in front of that of a farm.  This is not a practice that I now advocate as with time and inclination place-name data can be improved either by asking local people or by examining historic documents, through this form of research an appropriate name for the hill can usually be found.

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

During the updating of this hill’s details I made local enquiries relating to its name and was told that the area of land taking in the ridge comprising this hill is known as Cefn Penarth.

Therefore, the name this hill is now listed by in the Y Trichant – The 300m Hills of Wales is Cefn Penarth, and this was derived from local enquiry.

The full details for the hill are:

Group:  Pumlumon

Name:  Cefn Penarth

Previously Listed Name:  Mynydd Cefn-penarth

OS 1:50,000 map:  136

Summit Height:  318.9m (LIDAR)

Summit Grid Reference:  SN 92419 85333 (LIDAR)

Bwlch Height:  288.9m (LIDAR)

Bwlch Grid Reference:  SN 92025 85612 (LIDAR)

Drop:  30.0m (LIDAR)

Myrddyn Phillips (October 2020)