Over the bridge to Llangattock, then along the Monmouthshire and Brecon Canal by Llangynidr, Talybont-on-Usk and Pencelli to Brecon.
Distance: about 28 km (18 miles), one way, measured along the line on the map below.
The line follows waymarked footpaths and is a guide to the route, not a substitute for a proper map. Carry an Ordnance Survey map, check the weather before you set off and allow plenty of time.
Walk it with us
Our Usk Valley Walk holiday takes in this part of Wales, with accommodation booked, your luggage moved each day and route notes provided.
Photo: Derek Harper, CC BY-SA 2.0, via Geograph.