Jens Voigt of Germany riding for Trek Factory Racing rides in front of the peloton during stage four of the 2014 USA Pro Challenge on August 21, 2014 in Colorado Springs, Colorado. (Photo by Chris Graythen/Getty Images)
USA Pro Challenge - Stage 4
USA Pro Challenge - Stage 4
Elia Viviani of Italy riding for Cannondale celebrates his victory in stage four of the 2014 USA Pro Challenge on August 21, 2014 in Colorado Springs, Colorado. (Photo by Doug Pensinger/Getty Images)
USA Pro Challenge - Stage 4
USA Pro Challenge - Stage 4
Tejay van Garderen of the United States riding for the BMC Racing Team is awarded the best Colorado rider's jersey by Colorado Gov. John Hickenlooper after van Garderen also defended the overall race leader's jersey in stage four of the 2014 USA Pro Challenge on August 21, 2014 in Colorado Springs. (Photo by Doug Pensinger/Getty Images)
USA Pro Challenge - Stage 4
USA Pro Challenge - Stage 4
The peloton rides single file during stage four of the 2014 USA Pro Challenge on August 21, 2014 in Colorado Springs, Colorado. (Photo by Chris Graythen/Getty Images)
USA Pro Challenge - Stage 4
The peloton rides through the Garden of the Gods park during stage four of the 2014 USA Pro Challenge on August 21, 2014 in Colorado Springs, Colorado. (Photo by Chris Graythen/Getty Images)
USA Pro Challenge - Stage 4
USA Pro Challenge - Stage 4
USA Pro Challenge - Stage 4
The peloton races through the streets of downtown during stage four of the 2014 USA Pro Challenge on August 21, 2014 in Colorado Springs, Colorado. (Photo by Doug Pensinger/Getty Images)
USA Pro Challenge - Stage 4
USA Pro Challenge - Stage 4
USA Pro Challenge - Stage 4
USA Pro Challenge - Stage 4
Tejay van Garderen of the United States riding for the BMC Racing Team rides through the Garden of the Gods Park during stage four of the 2014 USA Pro Challenge on August 21, 2014 in Colorado Springs, Colorado. (Photo by Chris Graythen/Getty Images)
USA Pro Challenge - Stage 4
Elia Viviani of Italy riding for Cannondale celebrates his victory in stage four of the 2014 USA Pro Challenge on August 21, 2014 in Colorado Springs, Colorado. (Photo by Doug Pensinger/Getty Images)