Races›United States›Colorado›RMRR Marathon Training Series
Denver, CO, seen from above
March 2027 · date to be announced

RMRR Marathon Training Series

Denver, Colorado · United States
Road

Supported 10 and 20 mile marathon build-up races

Save to my season
Opens in RunCalendar.
Free on iPhone · No account needed.

Course

Low-cost, fully supported and officially timed training races of 10 and 20 miles, started from the Platte River Trailhead in Denver with mile markers along the route. A half marathon at Brighton closes out each spring series.

20 mile20 mi
10 mile10 mi

Key dates

Provisional date, projected from last year — the organiser has not announced this edition yet. We show the month only.

About

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

Your next race, seen from above.
Save RMRR Marathon Training Series to your season and RunCalendar reminds you the morning entries open and before they close. Free on iPhone, no account needed.
Get RunCalendar
More races in Colorado All ›
Run this event? Claim it on runcalendar.com
Visit event website ›

A confirmed date shows its day; a provisional one shows only its month, because we won't claim a day we don't have. This page is rebuilt every night from the RunCalendar catalogue.