Relay ultramarathons in United States (Southwest)

Repeated 10K pine-forest circuit at Rocky Hill Ranch, with singletrack, rolling hills, intermittent shade, and long-format options from 50K to 200K.

Scenic alpine 10K loop with 1,546 feet of vertical gain per lap, technical trails through aspen groves and meadows at Powderhorn Mountain

Night trail loops on undulating 3.2-mile course at Cedar Ridge Preserve, featuring wooded terrain, varying elevation, and multi-hour endurance format

Scenic loop route on dirt fire trails with modest elevation gain and classic trail ambiance

200-mile point-to-point course from Fort Collins to Steamboat Springs with mountain passes, open spaces, and road sections

Time-based ultrarun in Napa's Skyline Wilderness Park, 4.16-mile trail loop with 815 feet of gain per lap through rolling hills and historic landscapes

Scorching summer heat and technical ranch trails across 1,100 acres at historic 7IL ranch, including 100-mile and 100km ultramarathon relay distances

Scenic 2-mile loop at Harvey Bear Ranch with hill and mountain views, multiple distance options, generous cutoff times, and a community-focused environment.

Flat 2-mile loops on the Bonneville Salt Flats from sunset to sunrise, overnight relay or solo effort under starlit skies

30-leg road relay route from Idaho Springs to Buena Vista, traversing Guanella, Georgia, and Fremont passes with varied terrains and mountain views

Overnight team relay across 165 miles from Idaho Springs to Buena Vista, traversing Guanella, Georgia and Fremont Passes on scenic single track trails.

Looped 0.85-mile paved bike path through scenic Auburn, with picturesque ponds, shaded stretches, and multiple distance options

100-mile route from Flagstaff to the Grand Canyon on the Arizona Trail, with 7,000 feet of elevation gain, historic stagecoach tracks, and diverse forested high

50-mile route from Norco to Huntington Beach, traversing diverse Southern California landscapes with scenic beauty and rugged terrain

Paved, illuminated 2-mile loop with minimal elevation at Sparks Marina, featuring lakeside scenery, sandy beaches, and flexible distance or timed challenges

Flat 2-mile loops on Trinity River trails, mostly pavement with optional grass, centered on close-up crowd energy at Martin House Brewery.

Lap-based ultra in Montezuma County’s high desert with steep climbs, rocky descents, and views of Mesa Verde and Sleeping Ute Mountain.

50K point-to-point on Galveston Island’s open beach, with hard-packed sand, flat runnable terrain, Gulf views, and exposed coastal conditions.

Point-to-point 50K on Galveston Island’s open beachfront, with Gulf shoreline, ocean breeze, sunrise views, and an exposed runnable course.