This is the inaugural year of the Tour of California. This event replaces the San Francisco Grand Prix, which had a very successful five year run, with fans turning out in the near-million range.
The course started near the Ferry Building on the Embarcadero and finished at the base of Coit Tower. The purpose of a prologue is to sort general classification standings as the race goes into Stage 1.
Here are a few of the 700 or so pictures I got: