The Race
| Distance | 42.195 km |
| Course Type | Loop |
| Registration | Direct entry |
| Total Finishers | 2,500 |
| Avg Race Day Temp | 7.5--24°C |
| Cutoff Time | 6.5 Hours |
| Course Certification | USATF |
| Official Website | www.runcolfax.org |
The Colfax Marathon is a loop marathon held in Denver, United States in May. The race attracts approximately 2,500 finishers. Average race day temperatures are 7.5--24°C.
Weather
| Avg Race Day Temp | 7.5--24°C |
| Avg Humidity | 64% |
| Avg Wind Speed | 10.5 mph NW |
| Climate Consistency | Moderate Swings |
Full race guide - course description, key landmarks, and race-day tips - coming soon.
Entry
| Registration Type | Direct Entry |
| Entries Open | Preceding spring-autumn (varies by race) |
| Last Year Entries Opened | November 2025 |
| Next Event Date | 17 May 2026 |
The Colfax Marathon uses direct entry registration. Entries typically open Preceding spring-autumn (varies by race). For current entry details and to register, visit www.runcolfax.org.
Detailed entry breakdown - GFA standards, charity places, tour operator packages, and tips for first-time entrants - coming soon.
Race Weekend
Race weekend guide - expo details, race morning transport, course overview, and finish area logistics - coming soon.
Where to Stay
Hotel recommendations near the finish line, neighbourhood guide, and booking timeline coming soon.
See & Do
Attractions, day trips, and things to do in Denver for marathon runners - coming soon.
After the Race
Post-race itineraries - day trips, overnight escapes, and regional travel from the finish line - coming soon.