A sixty four mile loop from Sandy, starting westward on the old railway line to Bedford, crossing the Great Ouse for the first time on the lovely single track bridge at Great Barford. Then north towards St Neots with its handsome main square (crossing the Great Ouse for the second time), and north through the Offords to Godmanchester, passing Farm Hall of atom bomb fame. Into St Ives (best crossing of the Great Ouse on St Ives' fine medieval bridge), and east onto the old railway to Cambridge, paralleling the self-driving bus route and crossing the Great Ouse for the final time as it turns north away from its joyful meanders and towards its sad straight canalised channel to The Wash. Down the west side of Cambridge, good views across the Backs, thence to Barton (stopping at The Coffee Shed), through handsome Barrington (longest village green in Europe!), Orwell, through the grounds of Wimpole Hall, up Croydon Hill and around the park at Hatley St George. Gamlingay (hot chocolate and cake at LJ’s Sandwich Bar, good bike parking round the back), and round a few more country houses and well planted parks back into Sandy. Good variety of towns and country, best countryside the southern leg from Wimpole back to Sandy, nice rolling ridges, lots of woods, and very little traffic.  A pleasant square of quiet roads and countryside nestled between the larger towns and main roads.