Authorities were trying to determine why a 51-year-old cyclist collapsed and died on Highway 82 a short distance from the summit of Independence Pass.
Highway 82 over Independence Pass opens for the season at noon on Thursday.
The USA Pro Challenge featuring Tour de France champion Chris Froome began Monday afternoon in Aspen with two parade laps through downtown.
Crews with the Colorado Department of Transportation are getting some extra help in their effort to get Independence Pass cleared for the summer.
The city council in Aspen hopes to get drivers’ attention with an unusual speed limit sign.