Denver Colfax Marathon
Denver, United States of America · Tuesday 18 May 2027
Denver Colfax Marathon is Denver's only marathon, held over two days in May. The event features a full marathon, half marathon, Urban 10 Miler, and marathon relay, making it accessible to runners of all levels. The course takes participants through iconic sites like Empower Field at Mile High and along scenic waterways.
Difficulty Calculator
h
:m
:s
Adjusted Time
4:04:02
Time difference: +4.0 minutes compared to a flat, road, temperate course.
Course Details
Elevation Gain217m
Elevation High1685m
Elevation Low1577m
Weather Forecast
High23°C
Low7°C
Chance of Rain55%
How hard is Denver Colfax Marathon?
Difficultharder than 53% of marathons
Flattest / easiestHardest
On our difficulty model, Denver Colfax Marathon plays about 7 minutes slower than an average road marathon for a 3:30 runner. It ranks #536 hardest of 1150 marathons we analyse, and #288 of 575 in United States of America. Use the calculator above to see the exact adjusted time for your own goal pace.
What will you run at Denver Colfax Marathon?
Estimated finish times on this course versus the same effort on an average road marathon, based on its elevation, surface, and expected race-day temperature.
| Average-course time | On Denver Colfax Marathon | Difference |
|---|---|---|
| 3:00:00 | 3:00:20 | +00:20 |
| 3:30:00 | 3:32:06 | +02:06 |
| 4:00:00 | 4:04:02 | +04:02 |
| 4:30:00 | 4:36:09 | +06:09 |
| 5:00:00 | 5:08:24 | +08:24 |
| 5:30:00 | 5:40:49 | +10:49 |
| 6:00:00 | 6:13:21 | +13:21 |
Use the calculator above for your exact goal time. Want a prediction from your own training? Try the marathon time predictor.
Denver Colfax Marathon 2027 Course Analysis
Denver Colfax Marathon is a full marathon held in Denver, United States of America. It is scheduled for Tuesday 18 May 2027. The course is run on road surface with 217m of total climbing, with its high point near 1685m above sea level. For registration and full race details, visit the official Denver Colfax Marathon website.
Elevation Profile
With 217m of total climbing, this is a gently undulating course. The elevation changes are manageable for most runners and shouldn't greatly affect your pacing.
Expected Race Day Weather
Based on historical weather data for May, the expected race day conditions are as follows. Moderate temperatures between 7°C and 23°C are expected. While comfortable for most runners, those targeting fast times should pay attention to hydration, as these temperatures can impact performance on race day. There is a high chance of rain (55%). Runners should prepare for wet conditions, including appropriate footwear and clothing choices.
Surface Type: Road
Denver Colfax Marathon is run on road surfaces, which provide the fastest and most predictable conditions for racing. Road courses allow for consistent pacing and are typically the best choice for a personal best.
Looking for an easier marathon or a tougher challenge? You can also compare Denver Colfax Marathon against other marathons to find the right race for your goals.
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If Denver Colfax Marathon fits your goal, these courses play out about the same on our difficulty model.
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