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Colorado Mountain Half+ Series 2026
Littleton, Colorado · Sunday, September 13, 2026 · Half Marathon
Official race page & registration ↗Colorado Mountain Half+ Series 2026 takes place on Sunday, September 13, 2026 in Littleton, Colorado. The race is run over Half Marathon. It is run on trail. For anyone travelling in, Lakewood is about 8 miles away.
It is one of 155 races on the Colorado calendar that September.
- Date
- Sunday, September 13, 2026
- Location
- Littleton, Colorado
- Distances
- Half Marathon
- Surface
- Trail
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 Littleton: check in Sep 12, out Sep 14.
Common questions
When is Colorado Mountain Half+ Series 2026?
Colorado Mountain Half+ Series 2026 is scheduled for Sunday, September 13, 2026.
Where is Colorado Mountain Half+ Series 2026 held?
Colorado Mountain Half+ Series 2026 is held in Littleton, Colorado. It is about 8 miles from Lakewood.
What distances does Colorado Mountain Half+ Series 2026 offer?
The listed distances are Half Marathon.
How do I register for Colorado Mountain Half+ Series 2026?
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
- Sep 126 Dot DashLittleton, CO
- Sep 19Miles 4 Madison 5K & 1KLittleton, CO
- Sep 1331st El Grito 5k (2026)Denver, CO
- Sep 139/11 Heroes Run - Denver, ColoradoDenver, CO
- Sep 13Colorado Run for the Fallen Run/Walk/RuckPalmer Lake, CO
See every race on the Colorado calendar, all Littleton races, Colorado Half Marathons, or use the Race Finder for maps and filters.