The San Francisco Bay Area offers terrific biking, whether it is road biking through the Santa Cruz Mountains, Mountain Biking on Mount Tamalpias, or finding a rental for biking near San Francisco.
One of the most popular activities when visiting San Francisco is to rent a bike for a trip across the Golden Gate Bridge to the Golden Gate National Recreation Area or Sausalito.
Bay City Bike offers rentals and biking tours in San Francisco and across the bridge in Marin County.