Sarn Helen — 21miles, 33km

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, walkers and motorcyclists 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 staring point.

O/S Ref: SN923 288
Explorer OL12 & Explorer OL13