Good little river that passes through a series of fun mini-gorges. A few fences to watch out for - in particular in the upper reaches - but otherwise no nasties. Note that below Llangernyw the Cledwen becomes the Elwy.
Putin at the bridge in Gwytherin (just east of Betws-y-Coed), and takeout at the bridge in Llanfair Talhaiam.
Rainchasers is best experienced as an app.