April 12, 2010 - 5.0
Biking nirvana. Hairpins, switchbacks, climbs, drops, fantastic views (particularly southwards to the Riviera coast from south of Escragnolles. The section between Gap and Digne (through Sisteron) gives you a bit of welcome respite, but the run down from Castellane to Cannes is probably the part that most riders will cherish.
Combined with a detour around the spectacular Gorges du Verdon (south of Digne, west of Castellane), the Route Napoleon between Grenoble and Cannes is worth taking a couple of days over.
Be wary of snow on the higher altitudes between Grenoble and Gap.