Skip to content
iRun42
MarathonRoad🇺🇸 Denver, United States

Colfax Marathon

Sunday, 16 May 2027In 7 months · Start 06:00

Official site

Starts in City Park and follows Colfax Avenue, passing through Mile High stadium and Denver's parks at about 1,600 m.

Something out of date? Suggest a correction · Organizer of this race?

Facts checked 10 Oct 2026 against runcolfax.org, marathonguide.com.

Elevation gain
150 m
Rolling · ↓ 150 m
Highest point
1,640 m
above sea level
Temp at start
7°C
Peaks around 18°C
Entry fee
≈ $140
Open entry
Finishers
1,000
typical year
Course
Loop
Cut-off: check site
Getting thereFly into DEN (Denver), about 27 km from the start

Course map

A detailed route is not available for this race yet. The marker shows the race location.

Elevation profile

Rolling: about 150 m of climbing and 150 m of descent. A detailed profile isn’t available for this race yet.

Race-day weather

At start
7°C
Peak during race
18°C
Humidity
60%
Chance of rain
13%
Wind
7 km/h

Race day in past years

Historical averages for 16 May ±3 days, 2016–2025, from 06:00 for 5 hours (70 days sampled). Source: Open-Meteo / ERA5.

What time could you run here?Adjust your goal time for this course’s hills and typical race-day weather.Race time calculator →

Share this race

Organizing this race? Add it to your website

Show your runners the course facts and race-day weather. Paste this code into your site; it displays the badge below and links to this page. It updates automatically when the race details change.

Plan your trip

Searches are set for Denver and the race weekend.

Gear for this race

Some of these are affiliate links: if you book or buy through them we may earn a commission, at no extra cost to you.

Around the same time

All races in May 2027 →