BIKE & ROLL at Lombard & Columbus. Rent a bike head down to the wharf. Ride west to Maritime Park & Muni Pier. There is a small hill at Fort Mason but then an easy ride along Marina Green, Chrissy Field & Ft Point at the base of the GG Bridge. Ride, (or walk) the couple hundred yards up to cross the bridge. Glide downhill on Alexander Ave to Sausalito. Lunch and take a boat ride back to the Fisherman's Wharf, (SF). Best to book boat tickets in advance (see Blue and Gold Fleet link on this…