Set for its 8th annual running in 2020 under the Rock ‘n’ Roll Marathon series of races, the Rock ‘n’ Roll San Francisco Half saw more than 8,500 runners cross the finish line last year for this race that takes runners across the Golden Gate Bridge and back, up from just over 5,800 at its inaugural running back in 2013. The San Francisco Bay and is jam packed with music and entertainment from start to finish.