2011 Tour of California

The 2011 Amgen Tour of California was the sixth running of the Tour of California cycling stage race. It was held from May 15–22, and was rated as a 2.HC event on the UCI America Tour. Originally scheduled for eight stages, the race was due to begin in South Lake Tahoe, but snow around the Lake Tahoe area led to stage 1 being delayed, shortened and ultimately cancelled. The race concluded in Thousand Oaks as planned.

The race was won by Team RadioShack rider Chris Horner, who claimed the leader's yellow jersey with a victory on the event's fourth stage, and held his advantage to the end of the race. Horner's winning margin over teammate and runner-up Levi Leipheimer was 38 seconds, and Garmin–Cervélo's Tom Danielson completed the podium, 2 minutes and 7 seconds behind Leipheimer and 2 minutes and 45 seconds behind Horner. The comfortable margin that Horner and Leipheimer had over the field was due in part from a 1–2 performance on the event's queen stage where they finished over 40 seconds clear of the next placed rider.

In the race's other classifications, SpiderTech–C10 rider Pat McCarty won the King of the Mountains classification, Peter Sagan of Liquigas–Cannondale won the green jersey for the sprints classification, HTC–Highroad's Tejay van Garderen won the young rider classification, with Garmin–Cervélo finishing at the head of the teams classification.

There were no blood doping tests during the race.