From Brecon head towards Talgarth, at Talgarth pick up the A479 to Crickhowell, go through Crickhowell (petrol station on left) take a left up Standard Street and follow your nose. You can go into Grwyne Fawr which is a dead end, but nice road and wonder if the dirt track is doable. Turn around and head for Llanthony. Pop in the pub where you would swear you were in the 70s and every soft drink is a quid lol. Left out of the pub over hay bluff have an ice cream. At the top there is a view to the left (as you crest right on the road, superb view and the end of the trail you wonderd about earlier)
Into Hay for another ice cream

and head over the bridge on bridge street lol at junction A438 straight across towards Paincastle.
Follow it down the Z bends were it joins the A470 straight across up under a bridge and stop for a photo at sumit to the right. Take the next right and follow to a B4520 (from Builth) take a left, then a right after a couple of miles at Upper Capel, towards Garth. Up over the Eypant Ranges. At Garth turn left and refuel. After petrol station take a right to Lyne Brianne reservoir. It twists and turns up and over Devils stair case but keep following signs to main Dam. (You can go right at a junction towards Tregarron, but stay left. After Dam right towards Llandovery (there used to be a great sticky bun shop in Rhandirmyn straight after the Pub mmmmmm m) Onto Llandovery and to the expensive West end Cafe. Back to Brecon enjoy.
Wish Mel wasn't in Bath with the girlies I would join ewe!!!