RMRR Fall 2023 Marathon Training Series

Sun August 27 - Sun September 24 Thornton, CO 80229 US Directions

Race Website

Additional race information can be found at https://www.rmrr.org/race-reports/fall-marathon-training-series-calendar-2/.


Riverdale Ballfields in Thornton
9830 Riverdale Road
Thornton, CO US 80229


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

RMRR’s Marathon Training Series provides 10mi/20km and 20mi/30km races that are low cost, friendly, supported, and officially timed.  All you need to do is focus on your running!  Our races fit perfectly in training schedules for Chicago, New York, and other fall full and half marathons.

Everyone is welcome to Marathon Training Series races: RMRR members, guests, training team members, everyone!  The courses are well marked, with mile markers will help you gauge your time.  We’ll time your run, and winners of each distance will receive ribbons.  We make it easy for you to work on your pace, your nutrition and drinking, and getting everything ready for your big race.

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

The races begin at 7 am at Riverdale Ballfields at 9830 Riverdale Road in Thornton Colorado.
#1: Aug 27 - 10mi & 20mi
#2: Sep 10 - 20k & 30k
#3: Sep 24 - 10mi & 20mi
You are welcome to run 15mi, 25k, or another distance. Just let us know at the start.

RMRR Members receive a $5 discount off individual races and $15 off the 3-race bundles. Discount taken when you check out. Your membership must be current.

Race Contact Info

If you have any questions about this race, click the button below.

Directions to RMRR Marathon Training Races

The Marathon Training Series Races are held at the Riverdale Ballfields in Thornton Colorado.  The address is 9830 Riverdale Road in Thornton Colorado, 80229.The registration site has covered area with plenty of tables, and public restrooms.  


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