Cycle the "Paradise Loop" from the Golden Gate Bridge through Tiburon and back along 42 miles of scenic coastline and through quaint Sausalito and Tiburon.
Here's the route:
North across the Golden Gate bridge
Follow Bridgeway and the bike path through Sausalito and into Mill Valley where you pick up Camino Alto for a climb into Larkspur
Go right on Tamalpais Dr., cross 101, and continue on Paradise Dr.
Follow Paradise Dr. all the way around Tiburon until you end up at downtown Tiburon
Leave downtown Tiburon (after the requisite snack and water break) on Tiburon Dr.
Take a left back onto the Sausalito bike path, and head back towards the city