Cruisy grade 2 run with no nasties that is good for introducing beginners to moving water.
Putin at the upstream outskirts of Brecon just above the weir. Takeout at the bridge on the minor road off the A40 heading towards Talybont-on-Usk. Parking is a bit tight as you have to just tuck the car into the roadside on the river-right side of the bridge. A stile leads into the field on upstream river-right from which you can access the river just above the bridge.
Rainchasers is best experienced as an app.