From hub: Sennybridge.
Distance: 33.8 km, 21.0 miles.
Difficulty: Red. (Learn about gradings)
This sets off along farm tracks and country lanes before picking up the Sarn Helen Roman road, a classic route well known to mountain bikers and walkers alike. The return brings you down a fast tarmac descent and runs along the Senni Valley before rising up 150m again. The final stretch is along Heol Cefn Y Gaer, passing the site of one of the many hill forts in the Brecon Beacons National Park. The descent ends up very close to your starting point.
O/S Ref: SN923 288
Explorer OL12 & Explorer OL13