All Hill Details & GPS Waypoint

Allt Ddu 244m (800ft)

Classification: Hill Trigpoint, Clem, Hump, P30 Tump.
OS Grid Ref: SN739339 (10 figure Grid Ref: SN7390433992).
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 - South-West Wales (OS Maps 1:50k 146,160. 1:25k OL12W,187S.)
Latitude: 51.990029, Longitude: -3.8377908, Height: 244 metres (800 feet)
Prominence: 105 metres (344 feet)
Unique Waypoint POI Name: 0244.p (DoBIH Hill ID: 5244)

Associated Parent Hill:
   Crugiau Merched (462m, p205)

Associated Trigpoint:
  TP0688 'Black Wood' Grid Ref: SN7390433992 Separation: 92m from Hill grid ref.

External Links for Allt Ddu:
-GeoHack link... -OS Map Bing link... -Google Map link... -Geograph link... -Allt Ddu on -Black Wood on

Data courtesy of the Database of British and Irish Hills

Selected mapping: Google or Bing / Ordnance Survey

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Allt Ddu Hill List & GPS Waypoints:

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Member's Grid References for Allt Ddu...

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Allt Ddu has been climbed by...

Andrew Brown board Carole Chalky1953 Colin Crawford Des Taylor iaindbrown jonglew oakesave rhw stevent0809


Total = 1 Allt Ddu hills
* 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 the Database of British and Irish Hills