Which Colorado cities have the most Marathon races?
Fort Collins (2), Denver (1), Pine (1), Loma (1) lead the state for Marathon races. Those give you the most dates to choose from if your schedule is tight.
Colorado · Marathon
Marathon Races in Colorado
Every upcoming Marathon in Colorado, all 11 of them, sorted by date. Dates, entry fees, finish-time stats from past results, and start-line maps.
11 upcoming Marathon races · 6 with finish-time stats
By the numbers
The Biggest and Longest-Running
The Colorado races that stand out on the numbers: the biggest field, and the longest unbroken run of editions.
Marathon Races by City
Soonest Marathon Races in Colorado
11 total Sun, Aug 2, 2026Bound for Boston Marathon & Half Marathon - Denver Denver, COFrom $65Details Sat, Aug 22, 2026Staunton Rocks! Marathon and Half Marathon Pine, COFrom $110Details Sat, Sep 12, 2026Steele Trap Trail Run Loma, COFrom $50Register Sun, Sep 20, 2026Pikes Peak Marathon Manitou Springs, COFrom $100Details Sat, Oct 3, 2026Colorado Springs Marathon, Half, 5K, and Kids K Colorado Springs, COFrom $30Details Sun, Oct 4, 2026Windsor Marathon, Half Marathon, 10k, 5k & 1 Mile Run Windsor, COFrom $20Details Sat, Oct 10, 2026The Long View Marathon Fort Collins, COFrom $35Details Sat, Oct 10, 2026Breckenridge RunFest Breckenridge, COFrom $25Details Sun, Oct 11, 2026Durango Marathon Durango, COFrom $30Details Sun, May 2, 2027The Colorado Marathon Fort Collins, COFrom $40Details Sat, Jun 5, 2027Weld Your Mettle Running Festival Eaton, COFrom $35Details
How we calculate these stats: RunSesh calculates these figures from the most recent published results of past editions, sourced from RunSignup. We show aggregates only: field size, winning and median times, and the cutoff. We never publish individual finisher tables. Last updated Jul 27, 2026.
Common Questions About Running a Marathon in Colorado
When are most Marathon races held in Colorado?
October is the busiest month for Marathon races in Colorado, with 5 of the 11, followed by August with 2. If you are flexible on the date, that is the quickest way to narrow things down.
How much do Colorado Marathon races cost?
Entry fees for Marathon races here run from $20 to about $110, depending on the event and how early you register.
How early should I register for a Marathon in Colorado?
6 of the 11 Marathon races in Colorado already have a price increase scheduled, so entry gets more expensive the longer you leave it. Race pricing almost always steps up as the date approaches, and signing up early is usually the cheapest option.
Are Colorado Marathon races beginner-friendly?
Yes, for the most part. Across the 6 Marathon races in Colorado with published results, the typical median finish is around 4:55:58, which means half of every one of those fields came in slower than that. Recreational runners and walk-runners are the bulk of these fields, not the exception.
Are there trail Marathon races in Colorado?
Yes, 5 races around Colorado get you off the pavement: 4 are trail races, and 1 mixes road and trail. Surfaces are not always published, so it is worth checking a specific race before you register.