Cwm Treweryn
From hub: Sennybridge.
Distance: 14.5 km, 9.0 miles.
Difficulty: Blue. (Learn about gradings)
O/S Ref: SN923 288 Explorer OL12 & Explorer OL13
Taking in over 200m of off-road descending and an optional extra loop halfway around, Sennybridge Blue is a great half-day ride.