Blue Sky Marathon

Fort Collins, CO, USA · October 17, 2026

41°·66° high·Breezy·Dry

Weather

Pace Calc

Race Day Weather

41°at start

66° high

Breezy

Dry

Cool start, warm finish

Runners will face a temperature rise from 39°F at the start to 66°F by race's end. Wind will be light at 9 mph from the SE, with gusts reaching 29 mph. With humidity at 43%, runners should hydrate adequately and consider pacing conservatively as temperatures climb.

Race day forecast available in 157 days

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Distance: 26.2mi

Target Finish Time

0:00:00

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Race Info

The Blue Sky Marathon in Fort Collins, Colorado, offers runners a challenging 26.2-mile course through the picturesque Front Range mountains. Starting at the Blue Sky Trailhead in Horsetooth Mountain Park, the route features approximately 3,500 feet of elevation gain and loss, traversing a variety of terrains including smooth dirt trails, technical rock gardens, and distinctive redstone hardpack. With generous time allowances and a supportive community, this race caters to both seasoned trail runners and those new to the sport.

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FAQ

When is the 2026 Blue Sky Marathon?

The 2026 Blue Sky Marathon will be held on Saturday October 17, 2026.

Is the Blue Sky Marathon a Boston Marathon Qualifier?

No, the Blue Sky Marathon is NOT a Boston Marathon qualifier.

What is the time limit for the Blue Sky Marathon?

The time limit for the Blue Sky Marathon is 9 hours.

What will the weather be like for the 2026 Blue Sky Marathon?

The forecast calls for a high of 66°F and a low of 39°F with a 0% chance of rain.

Historical Weather

Based on 18 years of data

Avg Temp

65°F

L:40° H:66°

RunScore

Conditions

Rain Freq

1 of 18 yrs

Wind10mph

Dew31°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2025 Blue Sky Marathon Clear conditions throughout the day. 2025	30°/70°	-	32°
2024 Blue Sky Marathon Partly cloudy throughout the day. 2024	43°/60°	-	39°
2023 Blue Sky Marathon Clear conditions throughout the day. 2023	44°/79°	-	28°
2022 Blue Sky Marathon Partly cloudy throughout the day. 2022	43°/65°	-	31°
2021 Blue Sky Marathon Clear conditions throughout the day. 2021	28°/70°	-	23°
2020 Blue Sky Marathon Clear conditions throughout the day. 2020	37°/44°	-	17°
2019 Blue Sky Marathon Clear conditions throughout the day. 2019	35°/64°	-	20°
2018 Blue Sky Marathon Clear conditions throughout the day. 2018	37°/70°	-	29°
2017 Blue Sky Marathon Clear conditions throughout the day. 2017	43°/53°	-	14°
2016 Blue Sky Marathon Clear conditions throughout the day with late afternoon rain. 2016	51°/81°	-	42°
2015 Blue Sky Marathon Partly cloudy throughout the day. 2015	48°/54°	-	47°
2014 Blue Sky Marathon Clear conditions throughout the day. 2014	46°/75°	-	36°
2013 Blue Sky Marathon Clear conditions throughout the day. 2013	38°/67°	-	31°
2012 Blue Sky Marathon Clear conditions throughout the day. 2012	24°/56°	-	20°
2011 Blue Sky Marathon Clear conditions throughout the day. 2011	50°/84°	-	40°
2010 Blue Sky Marathon Clear conditions throughout the day. 2010	41°/77°	-	42°
2009 Blue Sky Marathon Partly cloudy throughout the day with rain. 2009	39°/46°	Light	37°
2008 Blue Sky Marathon Partly cloudy throughout the day with rain. 2008	48°/69°	-	41°