RMRR September Trophy Series

SEP

13

2026

A monthly low cost Trophy Series in Thornton Colorado offering 5K and 10K out and back courses. The 10K uses a handicap start based on estimated finish times to group runners by speed.

Sun 13 Sep 2026

Thornton, Colorado

Website

10 kilometers 5 kilometers

Always double-check with the organizer's website! This page may contain affiliate links.

RMRR September Trophy Series

Rocky Mountain Road Runners holds a monthly Trophy Series in the Denver area. The September event takes place on 2026-09-13 at Riverdale Ballfields, 9830 Riverdale Road, Thornton, Colorado. The event offers two distances:

10 km
5 km

The 10 km uses a handicap start system. Organizers ask for an estimated finish time at registration and assign start times so runners of similar speed begin together. The 5 km follows after the initial group of 10 km starters. Both courses are out and back and run on a mix of paved surfaces and smooth gravel. Parking is available at the park. Registration opens 2025-12-29 and closes 2026-09-12; the registration fee is $10. Race day packet pickup for race tags is handled on site prior to the race. The Trophy Series is presented as a low cost, low key racing option and is open to all participants. Visit the organization's website for the most recent information.

10 km

10k

5 km