RMRR September Trophy Series
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RMRR September Trophy Series, Thornton CO
Rocky Mountain Road Runners holds a monthly Trophy Series in the Denver area. The September event takes place on Sunday, September 13, 2026, at Riverdale Ballfields, 9830 Riverdale Road, Thornton, Colorado 80229. The series provides a low-key, low-cost racing environment and welcomes participants.
Race offerings include the following distances:
- 10 km
- 5 km
Both distances are out-and-back courses on a mix of paved surfaces and smooth gravel. The venue offers ample parking at the park.
The 10 km uses a handicap start system where slower runners begin before faster runners; organizers assign start positions using each runner’s estimated finish time so runners with similar speeds start together. The 5 km field follows after the initial 10 km starters. Race staff assist with assigning appropriate start positions when numbers are picked up.
Entry fees and registration details are managed by the organizer. The event is part of the ongoing Trophy Series hosted by Rocky Mountain Road Runners for the Denver area. Visit the organization's website for the most recent information.
