Colfax Marathon

Denver, CO, USA · May 16, 2027

44°·66° high·Light·Dry

Weather

Race Day Weather

44°at start

68° high

Light

Dry

Cool start, warming temps ahead

Runners will face a gradual temperature rise from 44°F at the start to a peak of 67°F. With light winds from the S, conditions will remain manageable but may feel warmer later. To maintain performance, runners should consider adjusting their pace as temps rise and stay hydrated throughout the race.

Race day forecast available in 191 days

4 AM

5 AM

6 AM

7 AM

8 AM

9 AM

10 AM

11 AM

12 PM

1 PM

2 PM

Pre-raceRace windowPost-race

Pace Calculator

Distance: 26.2mi

Target Finish Time

0:00:00

HH:MM:SS

Pace

—

Weather Adj.

—

Common Goals:

Get forecast alerts for Colfax Marathon

We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.

Race Info

The Colfax Marathon (previously known as the Colorado Colfax Marathon) is an annual marathon foot-race held in Colorado, United States, since 2006. Significant portions of the course follow Colfax Avenue. Wikipedia

Website

FAQ

When is the 2027 Colfax Marathon?

The 2027 Colfax Marathon will be held on Sunday May 16, 2027.

Is the Colfax Marathon a Boston Marathon Qualifier?

Yes, the Colfax Marathon is an official Boston Marathon qualifier.

What is the time limit for the Colfax Marathon?

The time limit for the Colfax Marathon is 6 hours.

What will the weather be like for the 2027 Colfax Marathon?

The forecast calls for a high of 69°F and a low of 43°F with a 9% chance of rain. Check our detailed hourly forecast above for the best marathon race plan.

Historical Weather

Based on 20 years of data

Avg Temp

64°F

L:44° H:64°

RunScore

Conditions

Rain Freq

1 of 20 yrs

Wind8mph

Dew34°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2026 Colfax Marathon Partly cloudy throughout the day with afternoon rain. 2026	51°/64°	-	39°
2025 Colfax Marathon Partly cloudy throughout the day with rain. 2025	45°/65°	-	42°
2024 Colfax Marathon Partly cloudy throughout the day. 2024	55°/76°	-	40°
2023 Colfax Marathon Partly cloudy throughout the day. 2023	48°/68°	-	41°
2022 Colfax Marathon Partly cloudy throughout the day. 2022	49°/68°	-	34°
2021 Colfax Marathon Clear conditions throughout the day. 2021	35°/64°	-	16°
2019 Colfax Marathon Partly cloudy throughout the day. 2019	37°/52°	-	35°
2018 Colfax Marathon Cloudy skies throughout the day. 2018	41°/52°	-	41°
2017 Colfax Marathon Becoming cloudy in the afternoon with late afternoon rain. 2017	40°/61°	-	32°
2016 Colfax Marathon Partly cloudy throughout the day. 2016	40°/55°	-	36°
2015 Colfax Marathon Partly cloudy throughout the day. 2015	45°/62°	-	33°
2014 Colfax Marathon Partly cloudy throughout the day. 2014	50°/79°	-	40°
2013 Colfax Marathon Partly cloudy throughout the day. 2013	48°/63°	-	33°
2012 Colfax Marathon Partly cloudy throughout the day. 2012	42°/68°	-	41°
2011 Colfax Marathon Cloudy skies throughout the day. 2011	34°/41°	Light	33°
2010 Colfax Marathon Partly cloudy throughout the day. 2010	38°/59°	-	38°
2009 Colfax Marathon Partly cloudy throughout the day. 2009	47°/73°	-	33°
2008 Colfax Marathon Partly cloudy throughout the day. 2008	48°/77°	-	34°
2007 Colfax Marathon Partly cloudy throughout the day. 2007	51°/74°	-	43°
2006 Colfax Marathon Partly cloudy throughout the day. 2006	31°/58°	-	25°

More CO Races

Aspen Backcountry Marathon

2027-07-31 · 42.200km · Aspen, CO, USA

Autumn Run

2027-09-18 · 21.100km · Buena Vista, CO, USA

BOLDERBoulder

2027-05-31 · 10.000km · Boulder, CO, USA

Steamboat Marathon

2027-06-06 · 42.200km · Steamboat Springs, CO, USA

Estes Park Marathon

2027-06-20 · 42.200km · Estes Park, CO, USA

Leadville Trail Marathon & Heavy Half

2027-06-26 · 42.500km · Leadville, CO, USA