Arches 50K

Moab, UT, USA · October 2, 2027·
partly-cloudy-day46°·62° high·Light·Dry
9
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Race Day Weather

partly-cloudy-day
46°at start
67° high
Breezy
Dry
Your goal
0:00:00

Cool start — fast day potential, big temp swing

A cool 46°F at the start line is ideal for fast times — expect to warm up quickly once you're moving. Temps will climb significantly to 67°F by later miles, so expect fading conditions as the race progresses. Light winds shouldn't be a major factor for pacing.

Race day forecast available in 324 days
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Pace Calculator

31.1mi
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Get forecast alerts for Arches 50K

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

Race Plan

Get your personalized Arches 50K 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

Race Info

The Arches 50K is the longest distance on the Behind the Rocks Trail course south of Moab, Utah, with roughly 3,000 feet of climbing between about 4,500 and 5,700 feet. It runs sandy double track, jeep road and desert meadow trail, loops past Picture Frame Arch, and returns to the start and finish area after an added loop through the dunes. Runners get views of the La Sal Mountains on the climb to the first aid station.

Race weekend

Saturday, October 2
7:00 AMMarathon (26.2 mi)
7:00 AM50K (31.1 mi)
8:00 AMHalf Marathon (13.1 mi)8:30 AM15K (9.3 mi)

FAQ

When is the 2027 Arches 50K?

The 2027 Arches 50K will be held on Saturday October 2, 2027.

What is the time limit for the Arches 50K?

The time limit for the Arches 50K is 9 hours.

What will the weather be like for the 2027 Arches 50K?

The forecast calls for a high of 71°F and a low of 46°F with a 6% chance of rain. Check our detailed hourly forecast above for the best 50K race plan.

Historical Weather

Based on 10 years of data
Avg Temp
58°F
L:49° H:66°
RunScore
8
Conditions
Rain Freq
0%
0 of 10 yrs
Wind8mph
Dew28°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2026
clear-night
53°/74°-
7
2025
partly-cloudy-night
59°/71°-
7
2024
clear-night
62°/81°-
7
2023
clear-night
44°/71°-
8
2022
clear-night
53°/70°-
7
2021
clear-night
49°/60°-
9
2020
clear-night
61°/73°-
7
2019
clear-night
30°/57°-
10
2018
cloudy
42°/48°-
9
2017
clear-night
36°/53°-
10