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RMRR Fall Marathon Training Series #3

Thornton, Colorado · Sunday, September 27, 2026 · 10 Mile, 20 Miles

Official race page & registration ↗

RMRR Fall Marathon Training Series #3 takes place on Sunday, September 27, 2026 in Thornton, Colorado. The race offers 2 distances: 10 Mile, 20 Miles. For anyone travelling in, Denver is about 10 miles away.

It is one of 155 races on the Colorado calendar that September. At $20, entry sits below the $35 median for a Colorado race.

Date
Sunday, September 27, 2026
Location
Thornton, Colorado
Distances
10 Mile, 20 Miles
Entry fee
from $20

Listing from the 2026 race calendar, refreshed nightly. Details can change: confirm date and entry on the official race page before travelling. Spot an error? Tell us here.

Making a race weekend of it?

Stay near the start line in Thornton: check in Sep 26, out Sep 28.

Hotels on Booking.com ↗ Hotels on Expedia ↗

Common questions

When is RMRR Fall Marathon Training Series #3?

RMRR Fall Marathon Training Series #3 is scheduled for Sunday, September 27, 2026.

Where is RMRR Fall Marathon Training Series #3 held?

RMRR Fall Marathon Training Series #3 is held in Thornton, Colorado. It is about 10 miles from Denver.

What distances does RMRR Fall Marathon Training Series #3 offer?

The listed distances are 10 Mile, 20 Miles.

How much does RMRR Fall Marathon Training Series #3 cost?

Entry is listed from $20. Check the official race page for the current price, which usually rises closer to race day.

How do I register for RMRR Fall Marathon Training Series #3?

Registration is handled on the official race page, linked at the top of this listing. Entry can close early if the race sells out.

More races nearby

See every race on the Colorado calendar, or use the Race Finder for maps and filters.