Map sheet number OL 13 in the detailed OS Explorer Map series covers an area from Blaina in the south to hay-on-Wye in the north and allows you to explore the Black Mountains and parts of well-known National Trails and Recreational Paths which criss-cross this area. The trails and paths include the Breacons Way, Herefirdshire Trail, Offa\'s Dyke Path, Taff Trail, Three Rivers Ride and Wye Valley.FeaturesDetailed and easy to read map from Ordnance SurveyScale: 1:25,000Covers the Black mountains, the Breacons Way, Herefirdshire Trail, Offa\'s Dyke Path, Taff Trail, Three Rivers Ride and Wye ValleyIncludes mobile download of map for use on your smartphoneShows tourist information points, popular sites, viewpoints, places of information and rights of way informationRecommended activity - navigation