Well that was an absurd amount of fun, racing from 7 a.m. to 7 p.m. on the flowing trails at Philip S. Miller Park. Thanks to the adults for racing and supporting the Colorado High School Cycling League - and thanks to the high schoolers for showing us how it's done on the trails!


The Sunrise to Sunset Elephant Rock course will travel clockwise around the beautifully engineered trails at the Philip S. Miller Park in Castle Rock, Colorado

The course is a 6.5 mile loop of flowy, playful trails with consistent terrain changes, short climbs and rewarding descents. It is approximately 90% singletrack with frequent passing zones and 10% dirt road.

Philip S. Miller Park
1375 W. Plum Creek Parkway
Castle Rock, CO

The race will start at 7:00 a.m. on Saturday, June 1 and will end at 7:00 p.m. that evening. Walk-on registrations will be accepted on Friday, May 31 from 5:00 p.m. – 9:00 p.m. and on race day from 5:30 a.m. – 6:30 a.m. We encourage all racers to arrive early. A pre-race briefing will be held at 6:45 a.m. at the start line.

Start Format

Sunrise to Sunset uses a modified Le Mans start format: All racers will start with both feet on the ground and run with their bikes to the top of the hill before mounting.