Bay Area resident Levi Leipheimer took the early lead in the Tour and secured the leader's golden jersey by winning the prologue time trial. His time of 4:53.43 put him ahead of second-place finisher Bobby Julich, who finished five seconds behind the leader . Americans swept the first five spots with George Hincapie finishing third, followed by Floyd Landis and David Zabriskie. The 1.9 mile prologue began at San Francisco's Ferry Building and climbed up Telegraph Hill to finish at the base of Coit Tower.
Sausalito to Santa Rosa
won the stage after a mass sprint, ahead of veterans Olaf Pollack and Stuart O'Grady from the UCI ProTour teams and. This was the first win for team Toyota-United Pro. controlled the race, letting Jean Marc Marino and Jackson Stewart escape, but keeping the time gap small enough to catch them before the finish. Arriving in his hometown in the leader's golden jersey, Levi Leipheimer was greeted by tens of thousands of his fans. By finishing near the front of the main pack, he retained the jersey for the next day.
Martinez to San José
Mike Creed sprinted away from the field just nine miles after the start. He was followed by Mads Kaggestad and Ben Jaques-Maynes. The three remained in front for the next 40 miles or so, until they were caught by the peloton. Bernhard Kohl won the King of the Mountain for the day. George Hincapie won the stage and with the ten second time bonus took the lead from Levi Leipheimer. This put Leipheimer in second place, four seconds behind Hincapie.
San José individual time trial
won the time trial and took over the lead in the overall with a time of 35:58 for the 17-mile course, 26 seconds faster than second-place finisher David Zabriskie, whose time for the third stage was 36:24. Landis' outstanding performance allowed him to gain 55 seconds on George Hincapie and 1:16 over Levi Leipheimer, establishing overall gaps of 45 seconds and 1:10 respectively, which were never to change throughout the remainder of the tour.
The longest stage of the tour closed with a mass sprint in San Luis Obispo, with Juan José Haedo taking his second stage of the race. Floyd Landis maintained the overall lead.
Another sprint to the finish line, and George Hincapie won his second ToC stage; however, the overall standings remained the same, with Floyd Landis holding on to the gold Leader's jersey. Hincapie did take the Sprinter's jersey while Levi Leipheimer, true to his strength, took the King of the Mountain jersey by collecting the first place points on the biggest climb of the stage, the category 1 climb of San Marcos Pass, 15 miles from the finish. He was caught, however, on the downhill.
Santa Barbara to Thousand Oaks
This short stage was won following yet another sprint to the finish; this time, by Olaf Pollack of Team T-Mobile. Pollack finished in 3:26:39 to take his first stage win in a major race in about 18 months. Floyd Landis maintains a 29-second overall lead heading into the final stage, a 10-lap, 76.5-mile circuit race in Redondo Beach.
Redondo Beach circuit race
again won the stage and the green sprinter's jersey. Floyd Landis' lead proved insurmountable, giving him the golden jersey signifying the overall win in the inaugural Amgen Tour of California by 29 seconds. The second- through seventh-place finishers all were less than 1:30 off the lead. Leipheimer won the King of the Mountain jersey. took Best Team honors.
