From Shaping SF :
Shaping San Francisco co-director Chris Carlsson  conducts historical tours of San Francisco by bicycle. Bring a snack and water — we don’t stop for food! Please email us to RSVP , less than five people cancels! (And include your phone number so we can call you if rain washes out the tour!)
More info: 415.608.9035
Need to Rent a Bike? Go to Pier 40 to the Bike Hut !