The River Wenning is a tributary of the River Lune, flowing through North Yorkshire and Lancashire. The name derives from the Old English Wann, meaning dark river. The Wenning is formed from the confluence of Clapham Beck, which rises above Clapham, and Austwick Beck, which rises in Crummackdale above Austwick. It then flows westwards through High Bentham, Low Bentham and Wennington. The river flows for 22.67 km and drains an area of 64.6 km2. It joins the River Lune approximately 1.5 km west of Hornby. This river's valley, together with Airedale, Wharfedale and upper Ribblesdale, make up the district of Craven.