Relay ultramarathons in United States (West Coast)

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

81-mile relay from Hilgard Junction State Park, with gravel climbs, 6,000 feet of elevation gain, Grande Ronde River views, and Elkhorn Mountains vistas

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

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

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

Women-only team relay along Spokane’s Centennial Trail, winding through riverside forests, rolling hills, and scenic Spokane vistas

Flat and fast course through the scenic Oregon outdoors with a river paddle, multiple river crossings, easy mountain biking, and navigation challenges

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

Mixed trails and pavement loop, cultural celebrations, and options from 12 to 48 hours with finisher medals and belt buckles for milestone distances

Self-supported fundraising run with 5K and 10K options, virtual or at San Francisco Ferry Building, featuring a scenic unmarked course

Food trucks, fitness activities, live music, and wellness expo alongside family-friendly entertainment zones

USATF-certified 1.0-mile loop around Cottonwood Lake with lake views, challenging endurance events including 24 Hour Solo and 100 Mile distances

Loop course on uneven, muddy winter trails at Bridle Trails State Park, shifting from daylight to night

24-hour format on the rugged Molcajete 1.0 loop, repeated again and again for a climbing-heavy endurance test.

Rugged 50K in Angeles National Forest with 9,000+ feet of climbing and descending on mostly dirt trails through steep canyon terrain.

Rugged loop course through Goodan Ranch Sycamore Canyon Preserve, varied natural terrain and canyon views just east of San Diego.

80 miles from the Sol Duc River to Sequim Bay, mixing paved Olympic Discovery Trail and singletrack Adventure Route through forest and waterfront scenery.