RunRace USA › Colorado › RMRR September 5k/10k
RMRR September 5k/10k
Thornton, Colorado · Sunday, September 13, 2026 · 10K, 5K
Official race page & registration ↗RMRR September 5k/10k takes place on Sunday, September 13, 2026 in Thornton, Colorado. The race offers 2 distances: 10K, 5K. For anyone travelling in, Denver is about 10 miles away.
It is one of 155 races on the Colorado calendar that September. At $10, entry sits below the $22 median for a Colorado 10K.
- Date
- Sunday, September 13, 2026
- Location
- Thornton, Colorado
- Distances
- 10K, 5K
- Entry fee
- from $10
Listing from the 2026 race calendar, refreshed nightly. Details can change: confirm date and entry on the official race page before travelling. Spot an error? Tell us here.
Making a race weekend of it?
Stay near the start line in Thornton: check in Sep 12, out Sep 14.
Common questions
When is RMRR September 5k/10k?
RMRR September 5k/10k is scheduled for Sunday, September 13, 2026.
Where is RMRR September 5k/10k held?
RMRR September 5k/10k is held in Thornton, Colorado. It is about 10 miles from Denver.
What distances does RMRR September 5k/10k offer?
The listed distances are 10K, 5K.
How much does RMRR September 5k/10k cost?
Entry is listed from $10. Check the official race page for the current price, which usually rises closer to race day.
How do I register for RMRR September 5k/10k?
Registration is handled on the official race page, linked at the top of this listing. Entry can close early if the race sells out.
More races nearby
- Sep 13RMRR Fall Marathon Training Series #2Thornton, CO
- Sep 1331st El Grito 5k (2026)Denver, CO
- Sep 139/11 Heroes Run - Denver, ColoradoDenver, CO
- Sep 13Colorado Mountain Half+ Series 2026Littleton, CO
- Sep 13Colorado Run for the Fallen Run/Walk/RuckPalmer Lake, CO
See every race on the Colorado calendar, Colorado 5Ks, Colorado 10Ks, or use the Race Finder for maps and filters.