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Flagstaff Marathon

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Flagstaff, AZ, USA · October 3, 2026·
clear-day56°·72° high·Breezy·Dry
6
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Flagstaff Marathon race day weather

clear-day
56°at start
75° high
Breezy
Dry
Your goal
0:00:00

Cool start, warming finish

Runners will face a temperature trend starting at 56°F and climbing to 74°F by the end. Wind will be moderate at 14 mph from the ESE, creating a mix of headwind, tailwind, and crosswind throughout the race. With average humidity at 43%, hydration will be essential, especially in the later laps as temperatures rise. Starting conservatively is advised to manage the heat as it builds.

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Pace Calculator

26.2mi
0:00:00
HH:MM:SS
Pace
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Enter a finish time to see what race day does to it.

Common Goals:

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Flagstaff Marathon route and elevation

The Flagstaff Marathon course has about 2,169 ft (661 m) of climbing and 2,161 ft (659 m) of descent, and finishes near the elevation it starts. It is hillier than 95% of the marathon courses racecast.io has mapped, measured by what the hills cost in time. The hardest mile is mile 11, with 222 ft (68 m) of climbing and a 4.2% average grade.

Biggest climbs

  • Miles 1.3 to 2.3: climbs about 245 ft (75 m).
  • Miles 9.7 to 11.5: climbs about 330 ft (101 m).
  • Miles 22.8 to 24.6: climbs about 330 ft (101 m).

What the hills cost

  • 3:30 on a flat course is about 3:37 here (7 minutes slower).
  • 4:00 on a flat course is about 4:08 here (8 minutes slower).
  • 4:30 on a flat course is about 4:39 here (9 minutes slower).

Hills only, priced mile by mile on the course map. The pace calculator above adds the race-day weather.

Even-effort splits for a 3:30, 4:00 or 4:30 finish
The Flagstaff Marathon mile splits at even effort for three finish times, with each mile's climb and descent
MileClimbDescent3:304:004:30
197 ft25 ft8:209:3110:43
2214 ft53 ft9:0810:2611:44
345 ft145 ft7:238:279:30
4193 ft10 ft9:1910:3911:59
539 ft219 ft7:118:129:14
611 ft142 ft7:188:219:23
782 ft20 ft8:159:2610:37
857 ft66 ft7:438:499:55
934 ft118 ft7:278:319:35
1053 ft37 ft7:539:0010:07
11222 ft0 ft9:4111:0412:27
1298 ft167 ft7:298:349:38
1310 ft143 ft7:188:209:23
1490 ft26 ft8:169:2710:38
15189 ft62 ft8:5010:0511:21
1676 ft128 ft7:338:399:43
17179 ft28 ft9:0210:1911:36
1854 ft171 ft7:218:239:27
1911 ft178 ft7:128:149:16
2068 ft32 ft8:029:1210:20
2171 ft51 ft7:559:0310:11
2234 ft121 ft7:268:299:33
2340 ft49 ft7:438:499:55
24218 ft0 ft9:3811:0112:24
25116 ft111 ft7:478:5410:00
2610 ft185 ft7:118:129:14
Last 0.20 ft23 ft1:391:532:07

Explore the Flagstaff Marathon course with the weather and your pace along the route, or compare it with other races.

Race Plan

Get your personalized Flagstaff Marathon race plan

A mile-by-mile breakdown of where your time goes, weather-adjusted splits, fueling timeline with aid stations, packing checklist, carb tracker, spectator guide, all built around your goal and race-day conditions.

Race Pace
Weather Splits
Nutrition
Gear & Packing
T-Minus
Carb Tracker
Spectator Guide
Race Band

About the Flagstaff Marathon

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

Race weekend

Saturday, October 3
8:00 AMMarathon (26.2 mi)
9:00 AMHalf Marathon (13.1 mi)9:30 AM10K (6.2 mi)

Flagstaff Marathon 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 75°F and a low of 43°F with a 0% chance of rain.

What is the elevation gain of the Flagstaff Marathon?

The Flagstaff Marathon course has about 2,169 ft (661 m) of climbing and 2,161 ft (659 m) of descent, and finishes near the elevation it starts.

Is the Flagstaff Marathon hilly?

Yes. It has about 83 ft (25 m) of climbing per mile. The hardest mile is mile 11, with 222 ft (68 m) of climbing and a 4.2% average grade. 4:00 on a flat course is about 4:08 here (8 minutes slower). It is hillier than 95% of the marathon courses racecast.io has mapped, measured by what the hills cost in time.

What is the weather usually like for the Flagstaff Marathon?

Over the 19 years racecast.io has race-day weather for (2006 to 2026), it averaged 55°F at the start and 71°F by a typical finish. Rain fell during race hours in 2 of those years (2007 and 2008).

What was the hottest Flagstaff Marathon?

Of the 19 years on record, 2024 was the warmest, reaching 80°F during race hours. The coldest start was 2023, at 39°F.

What was the windiest Flagstaff Marathon?

Of the 19 years on record, 2025 was the windiest, with wind averaging 13 mph during race hours. The calmest was 2016, at 2 mph.

Flagstaff Marathon weather history

Based on 19 years of data
Avg Temp
65°F
L:55° H:71°
RunScore
7
Conditions
Rain Freq
11%
2 of 19 yrs
Wind7mph
Dew34°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScore
2026
clear-day
56°/72°-
6
2025
clear-day
52°/63°-
9
2024
clear-day
59°/80°-
6
2023
clear-day
39°/68°-
9
2022
clear-day
47°/67°-
7
2021
clear-day
49°/64°-
8
2018
partly-cloudy-day
60°/80°-
5
2017
clear-day
55°/68°-
8
2016
clear-day
53°/72°-
8
2015
clear-day
58°/76°-
7
2014
clear-day
66°/72°-
5
2013
partly-cloudy-day
62°/72°-
6
2012
partly-cloudy-day
57°/76°-
7
2011
clear-day
56°/75°-
7
2010
clear-day
58°/72°-
7
2009
clear-day
54°/78°-
7
2008
clear-day
61°/78°Light
7
2007
partly-cloudy-day
55°/70°Light
7
2006
clear-day
40°/52°-
9