Marathon in Thornton, Colorado | 2026-2027

RMRR Spring Marathon Training Series #1 [rmrr.org] [Register at runsignup.com]
Sun, Mar 29, 2026 at 8:00 AM
Description
RMRR provides low-cost, low-keyed, supported, and timed training races for runners of all abilities. The races are planned to help you prepare for Boston, Colorado, Colfax, and other long spring...
RMRR provides low-cost, low-keyed, supported, and timed training races for runners of all abilities. The races are planned to help you prepare for Boston, Colorado, Colfax, and other long spring races. We make it easy for you to work on your pace, your nutrition and drinking, and getting everything ready for your big race.
- 3/29/26 - 10mi & 20mi
- 4/11/26 - 10mi & 20mi
Sign up for one, or save money and choose the two race bundle. RMRR members get 50% off.

The races begin at 8am, at the Platte River Trailhead Park, at 88th and Colorado, in Thornton. The courses are out-n-back. so we can accommodate almost any distance between 10-20 miles.

Please note that for everyone's safety dogs or running strollers are not permitted on our courses. Thanks for understanding.
10 Miles 20 Miles 40 Miles Marathon Run Trail
Thornton, Colorado, 80229, United States
OpenStreetMap Google Maps

RMRR Spring Marathon Training Series #2 [rmrr.org] [Register at runsignup.com]
Sat, Apr 11, 2026 at 8:00 AM

Description

RMRR provides consistent and individualized marathon training opportunities for runners of all abilities.

All races in the series are low cost, friendly, fully supported, and officially timed.The...

RMRR provides consistent and individualized marathon training opportunities for runners of all abilities.

All races in the series are low cost, friendly, fully supported, and officially timed.The first two races, March 29 & April 11, are 10 Mile and 20 Mile races (runners choice for distance). The third race in the series is the Inaugural Blue Heron half marathon. All you need to do is focus on your running! Our races fit perfectly in training schedules for Boston, London, Colfax, and other spring full and half marathons.

Everyone is welcome to Marathon Training Series races: RMRR members, guests, training team members, everyone! The course is clearly marked, and mile markers will help you gauge your time. Aid stations will have water, sports drink, and gels. Winners of each distance will receive ribbons and running store gift certificates. We make it easy for you to work on your pace, your nutrition and drinking, and getting everything ready for your big race.

RMRR members get a 50% discount (automatically taken at registration check out). Race day registration will be available.

Please note that for everyone's safety dogs or running strollers are not permitted on our courses. Thanks for understanding.

The races begin at 8 am at the Platte River Trailhead Park in Thornton, at 88th and Colorado.

10 Miles 20 Miles Marathon Run Trail
Thornton, Colorado, 80229, United States
OpenStreetMap Google Maps

2 events in Thornton, Colorado

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