RMRR Spring Marathon Training Series #1
10 Mile · 10 mi · 20 mi · 40 mi · Marathon
3/29/2026, 12:00:00 PM · Thornton, Colorado, US
Est. 2025 · Listed Dec 30, 2015
Run Vibes summary
Summarization pendingAI summarization pending
We haven’t generated Run Vibes’ quick-read summary for this race yet—it’s in the enrichment queue and will appear here soon with notes on vibe, race-day feel, and who the event suits best.
Until then, open Original listing below for the full source description, and double-check anything important on the organizer’s page.
Original listingFull description from sourceTap to expand · same text as on RunSignup / the official listing▾
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.
Related races
More events in Colorado, and comparable distances or challenge.
2 mi · 25 mi
3/28/2026 · Denver, CO
Est. 2025 · Listed Dec 23, 2024
AI summarization pending
We haven’t generated Run Vibes’ quick-read summary for this race yet—it’s in the queue and will show here when ready.
Full listing on the race page · official details from the source
AI summarization pending
We haven’t generated Run Vibes’ quick-read summary for this race yet—it’s in the queue and will show here when ready.
Full listing on the race page · official details from the source
AI summarization pending
We haven’t generated Run Vibes’ quick-read summary for this race yet—it’s in the queue and will show here when ready.
Full listing on the race page · official details from the source
AI summarization pending
We haven’t generated Run Vibes’ quick-read summary for this race yet—it’s in the queue and will show here when ready.
Full listing on the race page · official details from the source
AI summarization pending
We haven’t generated Run Vibes’ quick-read summary for this race yet—it’s in the queue and will show here when ready.
Full listing on the race page · official details from the source
AI summarization pending
We haven’t generated Run Vibes’ quick-read summary for this race yet—it’s in the queue and will show here when ready.
Full listing on the race page · official details from the source
AI summarization pending
We haven’t generated Run Vibes’ quick-read summary for this race yet—it’s in the queue and will show here when ready.
Full listing on the race page · official details from the source
AI summarization pending
We haven’t generated Run Vibes’ quick-read summary for this race yet—it’s in the queue and will show here when ready.
Full listing on the race page · official details from the source