VAIL – The USA Pro Cycling Challenge takes to the hills during its penultimate stage, with a fierce time trial climbing up Vail Pass.

The course's gentle grades give way to a steady climb for the last three miles. According to the USA Pro Cycling Challenge website, if you go too fast, you could burn out before the hardest part, but go too slow, and you'll lose.

Tejay van Garderen leads the race, with a 20-second advantage over Rafal Majka.

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(KUSA-TV © 2014 Multimedia Holdings Corporation)

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