50K April ultramarathons in United States

Sandy trails beneath longleaf pine canopy in Weymouth Woods-Sandhills Nature Preserve, cupless format with start/finish aid station

Repeated loops on private mountain trails, with relentless climbs, long switchbacks, and a remote, rugged feel in the Leatherwood Mountains.

Remote Moab desert trails with Navajo sandstone domes, sandy washes, technical singletrack, exposed rims, and La Sal Mountain views

Challenging 50-mile course on Florida’s Croom Hiking Trail with three loops through longleaf pine forests, scrub oak hills, creek bottoms, and cypress ponds

Point-to-point 50K on the Northern Kettle Moraine Ice Age Trail, with glacial landscapes, classic trail terrain, and early-season spring conditions.

Four-loop course linking Horsethief Canyon, Prairie, Alum Creek, and Big Bluff with varied canyons, prairies, creeks, and bluff scenery

Dirt single-track trails through Lake Meredith National Recreation Area, featuring 25K, 50K, and 50 mile distances amid West Texas scenery

Jeep trails and singletrack paths through Mt. Toby’s varied terrain, early-season race atmosphere

Six laps on scenic single-track trails through dense woods, frequent stream crossings, wildlife sightings, and approximately 566 feet of elevation change per c

Rocks and Roots Trail at Alum Creek, with spring mud, moisture, changing conditions, and a scenic runner-designed route.

Mostly singletrack 50K through Oak Mountain State Park, with varied terrain, two climbs up Double Oak Mountain, and views of Peavine Falls.

Snowshoe-required race on singletrack, doubletrack, and groomed trails near the Nordic Center; sub-8 mile loops with about 500 feet of elevation gain

Double summit course over Mount Diablo with challenging elevation, supporting local park preservation efforts

Two-loop 50K course on scenic single-track trails with rolling hills and lakeside views at Fort Yargo State Park near Atlanta

Custom route choices on varied terrain at McDowell Mountain, point-based scoring with flag and sandbag retrieval, five trails, flexible timed divisions

Looped 50k and 50 mile courses through scenic Memphis

Rugged 10-mile loop from Redwood Shelter through Cameron Park’s rolling hills, with demanding ups and downs on scenic Central Texas trails.

Rugged 50K in Marion Sansom Park: natural unpaved trails, rocky footing, rolling elevation, steep climbs, and technical river and waterfall sections.

Deceptively tough 50km two-loop course on Hill Country trails, with stream crossings, pine-lined paths, wildflowers, and steady climbing.