Fundamental Benchmark Details & GPS Waypoint

Mynydd Maen 472m (1548ft)

Summit Feature: Also recorded on OS maps as Mynydd Twyn-glas.
Classification: Hill Trigpoint, Clem, Hump, Marilyn, Pedwar, P30 Tump.
OS Grid Ref: ST259978 (10 figure Grid Ref: ST2599997845).
The original GR data for this hill was only accurate to a 6 figure grid reference (c.a 100m).
We have used additional user / trigpoint data to bring it up to 10 figures.

UK Area: 32 - Neath to Chepstow (OS Maps 1:50k 171. 1:25k 152.)
Latitude: 51.674481, Longitude: -3.071583, Height: 472 metres (1548 feet)
Prominence: 253 metres (830 feet)
Unique Waypoint POI Name: 0472.P (DoBIH Hill ID: 2292)

Associated Trigpoint:
  TP4391 'Mynydd Maen S2978' Grid Ref: ST2599597811 Separation: 12m from Hill grid ref.

External Links for Mynydd Maen:
-GeoHack link... -OS Map Bing link... -Google Map link... -Geograph link... -Mynydd Maen on -Mynydd Maen S2978 on

Data courtesy of Myrddyn Phillips and Aled Williams

Selected mapping: Google or Bing / Ordnance Survey

:Fundamental Benchmark | :Nearby Hill | :Nearby Trigpoint | : mouseover

Mynydd Twyn-glas List & GPS Waypoints:

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Member's Comments on Mynydd Maen...

Member's Grid References for Mynydd Maen...

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Mynydd Maen's Nearby Routes...

South Wales 100 ml (hillybilly)


Mynydd Maen has been climbed by...

Adrian Alex C Andrew Brown Anton Areluctant-triggeR Carole Chalky1953 Chris Pearson Chris Upson chriswatson Colin Crawford Des Taylor doddy dubmill Dugswell2 gerrybowes glynspencer GordonAdshead Griefmiester hillybilly iaindbrown Ian Baines Jim.Fothergill jonglew kasharic79 lauratheexplorer liz m malky_c Margaret micks trigs ngthack Nick Wakelam nordicstar NormanW oakesave outlawcatcher PM rhalstead rhayader_wanderer rhw RichTea russ russie Sprog SteveG stevent0809 Ted Richards tgrs thenomad Tony J Tundraboy


Total = 1 Fundamental Benchmark
* The waypoint data in italics is only accurate to a 6 fig grid reference. Click here to learn how to help improve it.
Data courtesy of Myrddyn Phillips and Aled Williams


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