A pleasant run with a few weirs to watch out for. Although the surroundings are certainly not idyllic, the last 2km in particular is good water. Takeout after the confluence with the Taff.
Putin · Takeout
This is a busy valley! Putin at the small bridge just off the A4059 upstream of Mountain Ash. Takeout after the confluence with the Taff from a layby on river right just downstream of Abercynon.
Rainchasers is best experienced as an app.