RMRR September Trophy Series
- Date
- September 13, 2026
- Distance
- 10k · 5k
From the Organizer
Rocky Mountain Road Runners holds a monthly Trophy Series in the Denver area. We provide a low-key, low-cost racing environment. Everyone is welcome to run with us!
The 10km race uses a handicap start system, slow-to-fast, spread over ~30 minutes. This gives everyone a chance to win. We'll use your estimated finish time to assign you a start time with others the same speed.
All 5k racers will start ~15min after the first 10km starters.
Race Day Details
Time: 10k starts at 8:00 am + your handicap.*
5k starts approximately 15min after the first 10k starter.
Show up 30 minutes early to get your tag and warm up.
Location: Riverdale Ballfields, 9830 Riverdale Road, Thornton, Colorado, 80229
Course: Both distances are out-and-back on a mix of paved and smooth gravel.
Parking: Plenty of parking at the park.
* The Trophy Series races use a unique, handicap start and scoring system. 10k racers start from slow to fast giving everyone a chance to win. When you register and pick up your number, we'll help you choose an appropriate start time that fits your estimated time.
Distances & Pricing
Race Location
About This Sport
From Endurance Grid's Founder
Endurance Grid is here to help you understand the sport, decide if it's the right fit, and learn how to prepare. For course distances, logistics, and race-day specifics, always defer to the race organizer's event page.
With running, there's a distance for every fitness level, a community at every start line, and nothing beats the feeling of crossing a finish line you trained for.
Running is an endurance sport that rewards consistency, and showing up every week compounds in ways that will surprise you.
Running
From 5K to marathon, running races are the most accessible entry point into endurance sport. There's a distance for every fitness level and a community at every start line.
Coming Up
More running races in CO
Smiles for Miles Memorial Day Fun Run - Sponsored by Dignity Memorial - Supporting Operation School Bell
The Hundo and The Hundito
Ourayce 10K Fun Run
10K
Eldorado Run for the Cure
Frequently Asked Questions (FAQs)
- What is the RMRR September Trophy Series?
- RMRR September Trophy Series is a running event held in Thornton, CO. Learn more about the different endurance sports here.
- When and where is the RMRR September Trophy Series?
- Sunday, September 13, 2026 in Thornton, CO at 9830 Riverdale Road, Thornton, CO. Check the official event page for exact start times and wave schedules.
- How do I register for the RMRR September Trophy Series?
- Registration is handled through their official registration page. Confirm pricing, distances available, and sign up there.
RMRR September Trophy Series
Sep 13, 2026