Yeading Brook is a tributary of the River Crane, in West London. It rises in major part from the Headstone Manor moat, and in minor part from a small stream flowing from Pinner Park (which is also the source of the River Pinn). It follows a meandering course through North Harrow, Rayners Lane, Ruislip, South Ruislip (skirting RAF Northolt as it does so where it joins the Roxbourne Brook shortly thereafter), and onwards to Southall, before its confluence with the Crane at Hayes. It is 16 miles (26 km) long and walkable along most of its length, passing through a number of parks, nature reserves and open spaces, including Yeading Brook open space (North Harrow), Roxbourne Park, Ruislip Gardens open space, Ickenham Marsh (where it joins the Hillingdon Trail), Gutteridge Wood and Meadows, Ten