Roman Kruzuger of Tinkoff Saxo has won the sixth stage of the US Pro Tour Challenge.
Back to the road after the individual time trial which Rohan Dennis of BMC won to extend his lead overall, stage six was from Loveland to Fort Collins and was 16kms long.
United Healthcare's Keil Reijnen took the first two sprints before a six man break in Roman Kreuziger (Tinkoff-Saxo), Nathan Brown (Cannondale-Garmin), Daniel Summerhill (UnitedHealthcare), Javier Megias (Novo Nordisk), Leonardo Basso (Trek), Dylan Girdlestone (Drapac Professional), and Tom Zirbel (Optum) got away.
Kruziger took the climb after 111kms on Rist Canyon and with the peloton still at 1.08, the Tinkoff Saxo rider shot off with Nate Brown with four kilometres left to race.
The chase group tried to pull them back but were struggling apart from Megias who caught them under the flam rouge.
Megias led them out with 450ms to go and it was the Czech rider Roman Kruziger who won his first stage of a race since the Amstel Gold race in 2013 in 3.50.35 ahead of Megias with Leonardo Basso in third, followed Dylan Girdlestone (Drapac Professional), and Tom Zirbel (Optum).
Race leader Rohan Dennis finished 15th to ensure that he goes into the final stage in Denver wearing the leader's jersey.