The essential map for outdoor activities in all weathers in Harlech, Porthmadog and Bala. The OS Explorer Active Map is the Ordnance Survey\'s most detailed folding map and is recommended for anyone enjoying outdoor activities including walking, horse riding and off-road cycling. This map now comes with a digital version which you can download to your smartphone or tablet.FeaturesDolgellauPorthmadogY BalaSnowdonia National ParkGwyneddClwyd1:25 000 scale (4 cm to 1 km \' 2.5 inches to 1 mile)Active weatherproof mapThis map comes with a digital version which you can download to your smartphone or tablet.