It is 16 miles 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 Acre Wood, and Yeading Brook Meadows, where it joins the Grand Union canal walk and shortly thereafter becomes the river Crane.