The rapid under the bridge in Llandovery can reach grade 3 in high water, but otherwise a relaxed and pleasant grade 2 touring run.
Putin at Dolauhirion, the minor road bridge just upstream of the main A40 bridge in Llandovery. Takeout at the bridge downstream of the Llandeilo A483 bridge, on a minor road between Llangathen and Golden Grove. It is possible to takeout in Llandeilo to shorten the run by 5km, but access to the river is tricky.
Rainchasers is best experienced as an app.