Arches 50K
Race Day Weather
Comfortable temps, big temp swing
Mild 53°F temps at gun time mean comfortable early miles without overheating risk. Temps will climb significantly to 83°F by later miles, so expect fading conditions as the race progresses. Light winds shouldn't be a major factor for pacing.
Pace Calculator
Enter a finish time to see what race day does to it.
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.
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 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.
