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Ordnance Survey Outdoor Leisure and Explorer maps at 1:25,000 are recommended. Although the outlay is considerable at £7.49 each, (minimum of nine required), most are double sided. The latest edition was especially timed to show all public access land, and are better value than the 1:50,000 Landranger maps, which do not show enough detail and are all single sided. The 1:250,000 map of Wales gives the whole picture and is useful for planning and distant view identification.
Outdoor Leisure and Explorer Maps 1:25,000 Scale |
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| Map Type / No. | Title | |
| Explorer 151 | Cardiff & Bridgend (see note 1 below) | |
| Explorer 152 | Newport & Pontypool | |
| Explorer OL 13 | Brecon Beacons National Park Eastern Area | |
| Explorer OL 12 | Brecon Beacons National Park Western Area | |
| Explorer 187 | Llandovery | |
| Explorer 213 | Aberystwyth & Cwm Rheidol | |
| Explorer 214 | Llanidloes & Newtown (see note 2 below) | |
| Explorer 215 | Newtown & Machynlleth | |
| Explorer OL 23 | Cadair Idris & Bala Lake | |
| Explorer OL 18 | Harlech, Porthmadog & Bala | |
| Explorer OL 17 | Snowdon | |
Note 1 Explorer Map 151 is required for the nine miles from Cardiff Castle to the Rhymney Valley Ridgeway at Rudry. Alternatively there is a free online Get-a-map service provided by the Ordnance Survey where the missing section can be downloaded and printed.
Note 2 Explorer Map 214 is required for less than 3km of the route, just past the summit of Plynlimon. This could be walked using the guidebook only. A grid reference of SN820890 in the Search field of Get-a-map gives most of the missing section and SN820875 will give the rest.
Grid Numbering on 1:25,000 Maps
Ordnance Survey maps have grid numbers printed at 10km intervals along each axis. This means that a folded map in a map case has only about a 30% chance of having grid numbers visible on both axes. To avoid having to remove maps from the map case whenever a grid reference is required, it is recommended that repeat numbering is marked on the maps close to the route wherever necessary, before commencing the walk.
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