August 20, 2013 Updated: August 20, 2013 at 4:05 pm
BRECKENRIDGE - In arguably the toughest stage in the three-year history of the USA Pro Challenge, the field of elite international cyclists splintered like never before Tuesday afternoon.
Boulder resident Lachlan Morton of Garmin-Sharp took over the yellow jersey as overall leader with a stellar performance on the climbs.
The day started with a steep ascent of Independence Pass, but the race really got going with multiple attacks on Hoosier Pass. Once the riders reached Breckenridge, the time gaps only widened during a short, very steep climb through town.
The seven-day race continues Wednesday with a route from Breckenridge to Steamboat Springs. It concludes Sunday in Denver.