The Peloton from the 2005 San Francisco Grand Prix.

The San Francisco Grand Prix was a road cycling race held in San Francisco, United States in early September. The race was organized as a 1.HC event and in 2005 it was part of the UCI America Tour. Although the race lasted just for five years, it soon gained fame and attracted hundreds of thousands of spectators.

The major difficulties of the race were the famous Fillmore and Taylor street climbs in San Francisco, short but very steep, both of which have an average 18% slope. It usually forced riders to weave back and forth in slow, painful efforts to get to the top.