The River Pool is 5.1 kilometres (3.2 mi) in length, and rises with its tributaries between Shirley and West Wickham in the London Borough of Croydon.
Land on either side is given up to sports grounds and a flood watch is kept continually on it.
In New Beckenham, the River Pool Walkway, running north from Lennard Road near the Midland Bank Sports Ground and Cator Park, includes a conservation site and naturalised areas; the route is part of the National Cycle Network.
At Sydenham, the section of the river that ran in a culvert under the gas works has been opened up and landscaped.
In June 2009, London Mayor Boris Johnson fell into the River Pool whilst promoting volunteering to clean up the waterway.