The 28 miles trail follows footpaths along or near the river Foss, starting from its confluence with the Ouse in York [SE 605511] and finishing at its source, Pond Head [SE 528695] four miles from Easingwold.
The route which is sign posted and has a frog logo is via Strensall, Sheriff Hutton, Crayke and Oulston.
For a route map click FOSS
For some information and history click River Foss Society
The walks booklet is available from several outlets including York based http://dalescourtpress.co.uk/