May
15
Saturday, May 15, 2027
9:00 AM - Sunday, May 16, 5:00 PM
About this event
The Colfax Marathon is Denver's premier spring running festival, held May 14-16, 2027, with a two-day expo at Empower Field at Mile High and races starting and finishing in the City Park area. The weekend features a full marathon, half marathon, an Urban 10 Miler, a marathon relay (with corporate, government, public-school, and open divisions), and a Colfax 5K on Saturday, so there's a distance for everyone. Courses run along historic Colfax Avenue and through Denver's neighborhoods and parks. The event has a strong charity backbone, awarding an average of about $150,000 to nonprofit partners each year, largely through its relay program. Register online; entry prices climb as race weekend approaches. Plan for the mile-high altitude, hit the expo for packet pickup, and enjoy one of the Rocky Mountain region's biggest road-running celebrations.
Event highlights
- Marathon, half marathon, Urban 10 Miler, relay, and 5K
- Runs along historic Colfax Avenue
- Marathon relay with team divisions
- Averages ~$150,000 to charities annually
- Two-day expo at Empower Field at Mile High
Good to know
- Audience
- Runners, walkers, relay teams of all levels
Event information is submitted by organizers and shown as provided. Please confirm details with the organizer before attending, times, prices, and locations can change.
Where
City Park (start/finish); expo at Empower Field at Mile High
Denver, Colorado
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Organizer
Colfax Marathon (nonprofit)