Flagstaff Marathon

Flagstaff, AZ, USA · October 3, 2026
clear-day61°·73° high·Breezy·Dry
7
Register
Weather
Course
Race Info
FAQ
History

Race Day Weather

clear-day
61°at start
73° high
Breezy
Dry

Comfortable temps, warming through the race

Starting at 61°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.

clear-night10
clear-day10
clear-day9
clear-day8
clear-day7
clear-day6
clear-day6
clear-day6
clear-day6
clear-day6
clear-day6
clear-day6
clear-day7

Get forecast alerts for Flagstaff 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

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

Race weekend

Saturday, October 3
8:00 AMMarathon (26.2 mi)
Half Marathon (13.1 mi)
10K (6.2 mi)

FAQ

Ask a Question about the Flagstaff Marathon

Racecast Concierge (free during beta)

Ask a question about the Flagstaff Marathon and we'll do the hard part and find the answer for you within 48 hours.

By using Racecast Concierge, you agree to receive email alerts pertaining to the Flagstaff Marathon and general racecast.io updates.

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 10% chance of rain.

Historical Weather

Based on 18 years of data
Avg Temp
67°F
L:54° H:73°
RunScore
7
Conditions
Rain Freq
11%
2 of 18 yrs
Wind9mph
Dew33°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScore

2025 Flagstaff Marathon

Clear conditions throughout the day.

2025
clear-day
51°/64°-
8

2024 Flagstaff Marathon

Clear conditions throughout the day.

2024
clear-day
59°/83°-
6

2023 Flagstaff Marathon

Clear conditions throughout the day.

2023
clear-day
36°/70°-
9

2022 Flagstaff Marathon

Partly cloudy throughout the day with rain.

2022
clear-day
48°/67°Light
8

2021 Flagstaff Marathon

Clear conditions throughout the day.

2021
clear-day
46°/64°-
8

2018 Flagstaff Marathon

Clearing in the afternoon.

2018
cloudy
55°/82°-
5

2017 Flagstaff Marathon

Clear conditions throughout the day.

2017
clear-day
55°/70°-
8

2016 Flagstaff Marathon

Clear conditions throughout the day.

2016
clear-day
53°/76°-
8

2015 Flagstaff Marathon

Clear conditions throughout the day.

2015
clear-day
58°/77°-
6

2014 Flagstaff Marathon

Partly cloudy throughout the day with afternoon rain.

2014
clear-day
63°/73°-
6

2013 Flagstaff Marathon

Clear conditions throughout the day.

2013
clear-day
61°/72°-
6

2012 Flagstaff Marathon

Partly cloudy throughout the day.

2012
partly-cloudy-day
57°/79°-
7

2011 Flagstaff Marathon

Becoming cloudy in the afternoon.

2011
clear-day
55°/79°-
7

2010 Flagstaff Marathon

Clear conditions throughout the day.

2010
clear-day
60°/75°-
7

2009 Flagstaff Marathon

Clear conditions throughout the day.

2009
clear-day
54°/79°-
7

2008 Flagstaff Marathon

Clear conditions throughout the day with late afternoon rain.

2008
partly-cloudy-day
58°/77°-
6

2007 Flagstaff Marathon

Partly cloudy throughout the day with rain.

2007
partly-cloudy-day
54°/65°Light
7

2006 Flagstaff Marathon

Partly cloudy throughout the day.

2006
clear-day
42°/55°-
9

More AZ Races

Rock n Roll Arizona
2027-01-17 · Tempe, AZ, USA
Whiskey Row Marathon
2026-10-10 · Prescott, AZ, USA
Garmin Tucson Marathon
2026-11-08 · Tucson, AZ, USA
Every Woman's Marathon
2027-02-28 · Scottsdale, AZ, USA
Tucson Marathon
2026-12-13 · 42.200km · Tucson, AZ, USA
The Marathon Project Gold Wave Marathon
2026-12-12 · 42.200km · Chandler, AZ, USA
Free guidesMarathon Fueling Guide·Carb Loading Guide·Race Morning Guide·Race Day Gear Guide·Pacing Strategy Guide·Mental Strategy Guide

Submit a correction

Spot something wrong or missing for the Flagstaff Marathon? Let us know and we'll update it.

You Need an Account For That

Setting up a racecast.io account will allow you to start building a reputation in the community. Over time you'll be able to rate races, join the discussion, and post in the community.

Right now we are invite only, you can get on the waitlist by entering your email below:

OR

Submit a race

Missing a race? Send it in and we'll add it to Racecast.