The third USA Pro Challenge bike race begins Monday in Aspen. Riders from all over the world, including recent Tour de France winner Chris Froome, will pedal more than 600 miles over seven days, finishing on Sunday, Aug. 25, with a circuit race in downtown Denver. CPR's Lesley McClurg gets a preview from Brian Holcombe, editor of Boulder-based VeloNews.com.

[Photo by Garrett Ellwood/Getty Images.]