Fundamental Benchmark Details & GPS Waypoint

Garreg Hir 485m (1591ft)

Summit Feature: 484.9m summit height and 150.7m drop from Leica 530 GPS survey. Name composition in accordance with standard modern Welsh and upland place-name principles. Also recorded on OS maps as Mynydd Post-llwyd.
Classification: Hill Trigpoint, Clem, Hump, Marilyn, Pedwar, P30 Tump.
OS Grid Ref: SN998979 (10 figure Grid Ref: SN9986997916).
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: 31 - Aberystwyth to Welshpool (OS Maps 1:50k 136. 1:25k 215E.)
Latitude: 52.569834, Longitude: -3.47883, Height: 485 metres (1591 feet)
Prominence: 151 metres (495 feet)
Unique Waypoint POI Name: 0485.P (DoBIH Hill ID: 2171)

Associated Trigpoint:
  TP2616 'Gareg Hir' Grid Ref: SN9989097789 Separation: 143m from Hill grid ref.

External Links for Garreg Hir:
-GeoHack link... -OS Map Bing link... -Google Map link... -Geograph link... -Garreg Hir on -Gareg Hir on

Data courtesy of Myrddyn Phillips and Aled Williams

Selected mapping: Google or Bing / Ordnance Survey

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Garreg-hir List & GPS Waypoints:

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Member's Grid References for Garreg Hir...

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Garreg Hir has been climbed by...

Andrew Brown Anton Carole Chalky1953 Chris Pearson chriswatson Colin Crawford Des Taylor Dugswell2 gerrybowes GordonAdshead iaindbrown IainT Ian Baines Jim.Fothergill Margaret millsno9 nordicstar oakesave PM rhayader_wanderer rhw RichTea Sprog stevent0809 thenomad Tony J Tundraboy vegibagger winerwalker


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