Fast and bouncy in big water; lots of weirs. At lost levels, all the weirs are runnable, the biggest being a sloping weir directly under the bridge in Ystalyfera. This is a possible takeout, or continue downstream to the Tawe confluence.
Putin in Ystradowen at a bridge down a small road off the A4068 just south of Cwmllynfell. Takeout in Ystalyfera, either at the bridge with the large weir underneath, or further downstream at the confluence with the Tawe.
Rainchasers is best experienced as an app.