Watersheds are made up of hills in the DoBIH whose summits lie within a 200m wide ribbon of terrain.  Within this ribbon, rain will flow down both sides of every hill into opposing river catchment areas.  There are 11 long distance routes across the length and breadth of the British Mainland together with catchment boundary circuits of 17 of our greatest estuaries, bays & firths.  A further 8 rivers with large populations are included as are North to South routes across Shetland and the Outer Hebrides.

Use the Mountain Search page to view maps and lists of hills by watershed.

Watershed Tump league tables can be viewed via the Watershed League page.