Denver Colfax Half Marathon
Denver, United States of America · Tuesday 18 May 2027
The Denver Colfax Half Marathon offers a unique urban running experience in the heart of Colorado’s capital. Starting near City Park, the course takes runners through diverse neighborhoods, a fire station (yes, really!), and even onto Colfax Avenue, the longest commercial street in the U.S. The mile-high altitude adds an extra challenge, but the stunning Rocky Mountain backdrop makes it all worthwhile.
Difficulty Calculator
h
:m
:s
Adjusted Time
1:44:03
Time difference: -1.0 minutes compared to a flat, road, temperate course.
Course Details
Elevation Gain80m
Elevation High1633m
Elevation Low1600m
Weather Forecast
High23°C
Low7°C
Chance of Rain55%
How hard is Denver Colfax Half Marathon?
Moderateharder than 26% of half marathons
Flattest / easiestHardest
On our difficulty model, Denver Colfax Half Marathon plays about 1 minute slower than an average road half marathon for a 1:30 runner. It ranks #335 hardest of 450 half marathons we analyse, and #116 of 145 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 Half Marathon?
Estimated finish times on this course versus the same effort on an average road half marathon, based on its elevation, surface, and expected race-day temperature.
| Average-course time | On Denver Colfax Half Marathon | Difference |
|---|---|---|
| 1:30:00 | 1:28:50 | −01:10 |
| 1:45:00 | 1:44:03 | −00:57 |
| 2:00:00 | 1:59:16 | −00:44 |
| 2:15:00 | 2:14:31 | −00:29 |
| 2:30:00 | 2:29:46 | −00:14 |
| 2:45:00 | 2:45:01 | +00:01 |
| 3:00:00 | 3:00:18 | +00:18 |
Use the calculator above for your exact goal time. Want a prediction from your own training? Try the marathon time predictor.
Denver Colfax Half Marathon 2027 Course Analysis
Denver Colfax Half Marathon is a half marathon held in Denver, United States of America. It is scheduled for Tuesday 18 May 2027. The course is run on road surface with 80m of total climbing, with its high point near 1633m above sea level. For registration and full race details, visit the official Denver Colfax Half Marathon website.
Elevation Profile
This is a very flat course, with only 80m of total climbing and little change in altitude throughout. Flat profiles let you hold an even pace from start to finish, which makes this a fast, PB-friendly race.
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 Half 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 Half Marathon against other half marathons to find the right race for your goals.
Half marathons of similar difficulty
If Denver Colfax Half Marathon fits your goal, these courses play out about the same on our difficulty model.
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