50K ultramarathons in Arizona, United States

Night trail running on flat, fast routes through Usery Mountain Regional Park, featuring Chain Fruit, Lost Sheep, Channel, and Blevins Trails

Point-to-point ultramarathon through the Sierra Prieta mountains with nearly 7,000 feet of elevation gain, rocky paths, and steep ascents and descents

Challenging trail races on the Arizona Trail with singletrack, rugged jeep roads, significant elevation gain, and scenic high-country forest landscapes

Desert night run under a full moon with multiple distance options, featuring 50-kilometer and 75-kilometer routes on McDowell Mountain Regional Park trails

Rugged Arizona Snowbowl trails with alpine scenery, technical paths, and relentless elevation gain up to 11,500ft on steep mountain loops.

Highly technical 50K through Prescott’s granite country, with rocky climbs, quick descents, and pristine singletrack among boulders and juniper desert.

Steep, rocky paths and open sun exposure on the Maricopa Trail, finishing in Cave Creek Regional Park with wide Sonoran Desert views

Rugged, remote Woodchute trails on Mingus Mountain; 6,000 feet of gain over 32 miles; tough terrain better suited for hiking than running

Rocky, technical trails through Phoenix Mountain Preserves with over 6,000 feet of elevation gain, minimal shade, and unmarked routes guided by GPX

Rugged jeep roads and steep trails along the 302, panoramic desert views, and Arizona Trail segments with Grand Canyon scenery

Challenging 50km course on scenic desert trails, part of the Aravaipa Running Desert Runner Trail Fall Series Ultra division

USATF certified 0.99-mile flat sidewalk loop at Estrella Mountain Regional Park, with foothill views and multi-day ultradistance formats

Scenic desert landscapes, rolling singletrack, quick ascents and descents on a mix of classic and newer trails in McDowell Mountain Regional Park

Scenic point-to-point 50k road ultra from Oracle to Catalina along the Santa Catalina mountains, net 2,200-foot descent, mostly paved, desert vistas

Steep, rocky paths and open sun exposure on the Maricopa Trail, finishing in Cave Creek Regional Park with wide Sonoran Desert views

Rolling singletrack through saguaro-studded Sonoran desert, with the steep, rocky Goldmine climb and wide-open views in San Tan Mountain Regional Park.

Desert singletrack and foothill paths in Estrella Mountain Regional Park, with Sonoran scenery and 100K or 100-mile options.

Fast 50K route through McDowell Mountain Regional Park, with gently rolling Sonoran Desert trails and wide-open views near Fountain Hills.

Rugged singletrack through Oracle State Park and remote Arizona Trail, constant elevation changes, Santa Catalina Mountain views

50-mile loop around Skull Mesa via Trail 4, Chalk Canyon and Seven Springs, with Sonoran Desert singletrack, creekside stretches and rugged canyons