Good intermediate paddle, with a lively gorge to finish off the trip.
Turn off the A4067 out 2km downstream of the cray reservoir and follow small roads back up towards the reservoir to reach a small bridge. There is not much space to park here. Takeout at the Usk in Sennybridge: take the turning into the Army barracks and then head down a small road just to the right of the barracks next to the river.
Rainchasers is best experienced as an app.