Join the Oakland Museum of California Docents on a Bicycle. Tour this summer. Discover and explore the incredible history of Oakland, its visionaries and its scoundrels—who often were the same.The tours are free. Just bring your bikes, helmets, and repair kits and meet us at the 10th Street museum entrance on the third Sunday of the month from May through October. Tours leave promptly at 10 am. Each tour is about six miles long, with few if any hills, and lasts two to two and a half hours.