San Francisco individual time trial

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 (3.1 km) 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

Juan José Haedo won the stage after a mass sprint, ahead of veterans Olaf Pollack and Stuart O'Grady from the UCI ProTour teams T-Mobile Team and Team CSC. This was the first win for team Toyota-United Pro.

Gerolsteiner controlled the race, letting Jean Marc Marino (Crédit Agricole) and Jackson Stewart (Kodakgallery.Com-Sierra Nevada) 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 (Gerolsteiner) 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 (TIAA-CREF) sprinted away from the field just nine miles (14 km) after the start. He was followed by Mads Kaggestad (Crédit Agricole) and Ben Jaques-Maynes (Kodak Gallery.com/Sierra Nevada). The three remained in front for the next 40 miles (64 km) or so, until they were caught by the peloton. Bernhard Kohl (T-Mobile) won the King of the Mountain for the day.

George Hincapie (Discovery Channel) won the stage and with the ten second time bonus took the lead from Levi Leipheimer (Gerolsteiner). This put Leipheimer in second place, four seconds behind Hincapie.

San José individual time trial

Floyd Landis 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.

Monterey to San Luis Obispo

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.

San Luis Obispo to Santa Barbara

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 (24 km) 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

Olaf Pollack 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 (Zabriskie, Julich, Hincapie, O'Neill, Leipheimer and Evans) all were less than 1:30 off the lead. Leipheimer won the King of the Mountain (orange) jersey. Team CSC (sponsored by the Danish subsidiary of the California-based Computer Sciences Corporation) took Best Team honors.

Final standings top ten riders

Overall	Name	Nationality	Team	Time
1	Floyd Landis	United States	Phonak	22 hr 46'46"
2	David Zabriskie	United States	Team CSC	0.29
3	Bobby Julich	United States	Team CSC	0.34
4	George Hincapie	United States	Discovery Channel	0.45
5	Nathan O'Neill	Australia	Health Net p/b Maxxis	1.08
6	Levi Leipheimer	United States	Gerolsteiner	1.10
7	Cadel Evans	Australia	Davitamon–Lotto	1.29
8	Tom Danielson	United States	Discovery Channel	1.49
9	Christian Vande Velde	United States	Team CSC	1.55
10	Jason McCartney	United States	Discovery Channel	1.58