About 950 riders registered for the 12-hour endurance race at Phil’s World in Cortez.
After coming out of the tunnel, racers climb a hill during the 12 Hours of Mesa Verde race.
Riders pass through the tunnels going under U.S. Highway 160 Saturday in the 12 Hours of Mesa Verde race.
Racers go under U.S. Highway 160 Saturday during the 12 Hours of Mesa Verde race.
Spectators watch for racers Saturday during the 12 Hours of Mesa Verde.
Wearing a pink tutu, a racer takes off on another loop of the trail during the 12 Hours of Mesa Verde race.
Hannah MacLaren starts her third loop around the trail in the 12 Hours of Mesa Verde race Saturday.
Shawn Gregory takes off on another loop of the Phil's World track during the 12 Hours of Mesa Verde race Saturday.
The Montezuma County Fairgrounds is packed with tents Saturday as racers participate in the 12 Hours of Mesa Verde.
A jumble of bikes await riders for their turn in the 12 Hours of Mesa Verde.
