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Arches Ultra Half Marathon


The half marathon option of Arches Ultra, touring Moab's Bar M Trail System.

Trail Running Moderate

21 km
262 m
262 m
2-3 hrs
Low Point
1.4 km
High Point
1.5 km
Arches Ultra Half Marathon Map

First held in 2018, Arches Ultra is one of Moab's newest races presented by Mad Moose Events and offers 9k, half marathon, 50k, and 50 mile options. Bordering Arches National Park, racers are awarded incredible views of Moab's beautiful red rock terrain, sandstone domes, towering cliffs, and the snow-capped La Sals to the southeast. Whether you're in Moab for the race, or there to explore on your own time, the half marathon route can be run year round and tours some of the best trails in the Bar M Trail Network. "Arches Ultra is also the second event in The Triple Crown of Moab," a multi-race challenge that includes the Dead Horse and Behind the Rocks Ultras.


The event is held in the middle of winter each year and pairs several lower elevation trail systems, specifically Bar M, Klonzo, and Klondike Trails, according to the race director. While snow is possible, accumulation is unlikely at these elevations. Average high temperatures during January typically linger in the mid-40's, while freezing temperatures are expected overnight.

All racers start and finish at the Gemini Bridges Trailhead, just 20 minutes north of Moab on US-191. With limited parking available, the race director suggest carpooling from town. Other than special events, neither water nor restrooms are available, so bring plenty with you. If you're running this loop on a day other than the race, you might prefer parking at the Brand Trails (Bar-M) Trailhead on the opposing side of the highway. The two trailheads are simply connected by uneventful doubletrack.

With a 9am start on race day, the half marathon runners climb a total of 1,000', exploring a mixture of doubletrack, slickrock, and sandy washes. The course begins on doubletrack, then transitions onto groomed singletrack as it winds across the desert floor. Runners will visit Lazy Trail, Circle O, and Rockin A trails, all local classics and perfect for experienced and newer trail runners. While a handful of racers will finish in under 90 minutes, most finish between two and three hours.

Source: https://www.madmooseevents.com/arches-ultra



Medium Exposure

2 out of 4

The trail contains some obstacles such as outcroppings and rock which could cause injury.


2 out of 4

Away from help but easily accessed.

Best time to visit

all year round

Similar routes nearby

Guidebooks in this area