He is the patron of the widely attended King Ridge GranFondo, a mass participation ride in Sonoma County.

The United States Anti-Doping Agency (USADA) announced in October 2012 that Leipheimer would be suspended for his involvement in doping while riding for U.S.

[7] Leipheimer, riding for Team Einstein, won the 1996 U.S. National Criterium Championships in Grandview Heights, Ohio,[8][9] but tested positive for ephedrine, a banned substance.

[10][11] Leipheimer's family later claimed that the positive test was not indicative of doping, but rather, the result of his taking allergy medicine Claritin-D to relieve hay fever.

Leipheimer won both time trials of the 2008 Vuelta a España, leading the race after the fifth stage, and placed second overall.

Riding with Astana in the 2009 Tour de France, Leipheimer broke a wrist in a crash near the end of stage 12, when he was 4th overall, and abandoned the race.

Leipheimer also won the stage finishing at the Mount Baldy ski area, and was second in the individual time trial.

However, while on a training ride on the eve of the Vuelta Ciclista al Pais Vasco, he broke his fibula when he collided with a car.

[24] Leipheimer won a stage of the Tour of Utah,[25] and finished third overall in the USA Pro Cycling Challenge, having led the race for one day.

As previously noted, Leipheimer had cooperated with USADA in their case against Lance Armstrong, and detailed his own use of performance-enhancing drugs and methods while riding for U.S.

In an October 2012 op-ed for the website of The Wall Street Journal ("Why I Doped"), Leipheimer also asserted to have raced the last five years of his career clean.

[28] Leipheimer and four other riders — George Hincapie, Christian Vande Velde, David Zabriskie and Tom Danielson — received six-month suspensions and were stripped of results.