Flagstaff Marathon

Flagstaff, AZ, USA · October 3, 2026

62°·73° high·Breezy·Dry

Weather

Race Day Weather

62°at start

73° high

Breezy

Dry

Comfortable temps, warming through the race

Starting at 62°F, heat will be a factor from the gun — go out conservative and stay on top of hydration. Temperatures rising to 73°F through the course will gradually increase perceived effort in the second half. Light winds shouldn't be a major factor for pacing.

Race day forecast available in 6 days

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Race Info

Known as the “The Coolest Marathon in Arizona,” The Flagstaff Marathon is a completely off-road course in the Coconino National Forest. At 8,000+ ft. elevation, it is known as one of the most challenging courses in the country, with 1,200 feet of climbing for the half marathon and 2,400 for the full, and composed entirely of single and double track trails. Source

Website

FAQ

When is the 2026 Flagstaff Marathon?

The 2026 Flagstaff Marathon will be held on Saturday October 3, 2026.

What is the time limit for the Flagstaff Marathon?

The time limit for the Flagstaff Marathon is 8 hours.

What will the weather be like for the 2026 Flagstaff Marathon?

The forecast calls for a high of 73°F and a low of 51°F with a 5% chance of rain.

Historical Weather

Based on 18 years of data

Avg Temp

70°F

L:54° H:73°

RunScore

Conditions

Rain Freq

11%

2 of 18 yrs

Wind11mph

Dew32°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2025 Flagstaff Marathon Clear conditions throughout the day. 2025	51°/64°	-	26°
2024 Flagstaff Marathon Clear conditions throughout the day. 2024	59°/83°	-	27°
2023 Flagstaff Marathon Clear conditions throughout the day. 2023	36°/70°	-	14°
2022 Flagstaff Marathon Partly cloudy throughout the day with rain. 2022	48°/67°	Light	40°
2021 Flagstaff Marathon Clear conditions throughout the day. 2021	46°/64°	-	38°
2018 Flagstaff Marathon Clearing in the afternoon. 2018	55°/82°	-	38°
2017 Flagstaff Marathon Clear conditions throughout the day. 2017	55°/70°	-	33°
2016 Flagstaff Marathon Clear conditions throughout the day. 2016	53°/76°	-	20°
2015 Flagstaff Marathon Clear conditions throughout the day. 2015	58°/77°	-	37°
2014 Flagstaff Marathon Partly cloudy throughout the day with afternoon rain. 2014	63°/73°	-	51°
2013 Flagstaff Marathon Clear conditions throughout the day. 2013	61°/72°	-	48°
2012 Flagstaff Marathon Partly cloudy throughout the day. 2012	57°/79°	-	30°
2011 Flagstaff Marathon Becoming cloudy in the afternoon. 2011	55°/79°	-	28°
2010 Flagstaff Marathon Clear conditions throughout the day. 2010	60°/75°	-	33°
2009 Flagstaff Marathon Clear conditions throughout the day. 2009	54°/79°	-	19°
2008 Flagstaff Marathon Clear conditions throughout the day with late afternoon rain. 2008	58°/77°	-	36°
2007 Flagstaff Marathon Partly cloudy throughout the day with rain. 2007	54°/65°	Light	52°
2006 Flagstaff Marathon Partly cloudy throughout the day. 2006	42°/55°	-	25°

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