Denver Colfax Marathon
Denver Colfax Marathon is the big urban marathon in Denver, known for city landmarks, relay energy, and a race weekend that stretches well beyond the full.
Denver Colfax Marathon quick facts
- Denver's primary urban marathon weekend, with major relay participation.
- Current-year timing is routed through Xacte from the main race site.
- Official race-results hub remains live on the event site for 2026.
- Best fit for runners who want city-race energy more than a controlled downhill setup.
What is the Denver Colfax Marathon?
The Denver Colfax Marathon is a city marathon in the fullest sense, with a weekend footprint and relay presence that make the event feel bigger than a single 26.2-mile race. It is the kind of race where the city's identity matters as much as the timing mats.
Denver Colfax Marathon course route
The marathon is built as an urban tour, not a downhill specialist race or a quiet suburban loop. Between the city setting, relay traffic, and Denver altitude, the course asks for more patience than runners sometimes expect from a big-profile metropolitan event.
Weather for the Denver Colfax Marathon
Denver can offer a cool start, but the altitude, dry air, and fast-rising sun change the effort quickly. If the day brightens early, the course can feel harder than the clock suggests.
Past Denver Colfax Marathon dates and results
| Year | Date | Status | Results |
|---|---|---|---|
| 2026 | Sunday, May 17, 2026 | — | — |
| 2025 | — | Completed | Open results |
Denver Colfax Marathon FAQ
When is the Denver Colfax Marathon?
The 2026 Denver Colfax Marathon is on Sunday, May 17, 2026.
How do I register for the Denver Colfax Marathon?
You can register for the Denver Colfax Marathon at runcolfax.org.