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RMRR September Trophy Series logo

RMRR September Trophy Series

Sun, Sep 13, 2026, 8:00 AM MDT

Location
Thornton, CO
9830 Riverdale Road, 80229
Type
RUN
Official registration

Sign up and verify details on the organizer’s official page.

Vibe analysis coming soon

Course feel, difficulty, and community fit are being added to this listing. Check back, and always confirm details on the official registration page.

At a glance

Perks & features

  • Awards

From the public listing — confirm on the official site.

Auto-drafted from the public listing — confirm details on the official event page before signing up.

Distances & registration

2 options

Registration for all distances is through the official signup link above.

  • 5K

    Sun, Sep 13, 8:15 AM MDT · From $11.60

    Opens Dec 29, 2025, 4:00 AM MST · Closes Sep 11, 2026, 7:59 PM MDT

  • 10K

    Sun, Sep 13, 8:00 AM MDT · From $11.60

    Opens Dec 29, 2025, 4:00 AM MST · Closes Sep 11, 2026, 7:59 PM MDT

Vibe Check

Push Potential

Mixed surface + hills, altitude

  • Mostly trail
  • High altitude

Based on terrain, weather, and distance data.

The course

  • —
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.

Also in this area

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