SF/SV are actually incredibly well-suited for biking. Beyond the weather, Caltrain is unusually bike-friendly rail, with ~100 bike racks per train (on multiple

SF/SV are actually incredibly well-suited for biking. Beyond the weather, Caltrain is unusually bike-friendly rail, with ~100 bike racks per train (on multiple special bike cars per train). Palo Alto boasts an 87 'bike score' (higher than Minneapolis or Portland) and a network of bike boulevards that discourage through car traffic. San Francisco is investing heavily in rearranging streets for protected bike lanes, and there are plenty of SF city dwellers without cars.