50K Summer ultramarathons in United States

Hilly 50KM double-loop trail race on runnable gravel and mixed tracks, seven major climbs per loop, river valley ascents, and rugged scenic terrain

Rocky out-and-back course through Bear Valley and Lake Spaulding, steep ascents on Signal Peak loop, challenging terrain with rugged segments

Technical singletrack and rolling fire roads through shaded oak groves and exposed hillsides, with sweeping Bay Area views and a challenging elevation profile

16.5-mile loops through Finger Lakes National Forest, single-track trails, grassy pastures, dirt and paved roads, 1292 feet elevation gain per loop

High-elevation 50k traversing Grand Targhee's renowned trails and ridgelines, with sweeping mountain views

Scenic Sammamish River Trail out-and-back with steep early descent, bridge crossing, fields at 60 Acres Park, and multiple parkway turns

Technical single track climbs on Bells Mountain, stream crossings, waterfalls, and views of Mt. St. Helens along the Tarbell Trail to Moulton Falls Arch Bridge.

Scenic waterfront course from Magnolia to Lincoln Park, blending trails and urban routes with views of Elliott Bay, Myrtle Edwards Park, and city landmarks

Forested singletrack, open ski hill ascents, and technical descents over five 10k laps at Cannonsburg Ski Area

Night race on runnable jeep roads and technical terrain at Twin Mountains Offroad Park, with frequent loops and hot, humid conditions.

Six-loop 50K on technical, rocky singletrack with roots, foot bridges, over 4,000 feet elevation gain, minimal doubletrack, and frequent aid access

Trail route through towering coastal redwoods, stream canyons, meadows, pine and oak forests, ridges, and San Lorenzo river crossings

Singletrack course along the North Country Trail with rolling bluffs, Lake Michigan views, coastal forests, wilderness lakes, and the Sturgeon Bay Trail.

50-mile out-and-back on the Pacific Crest Trail, shaded forest canopy, soft yet technical terrain, 5,630 feet of elevation gain, mountain views

Challenging 50k course on abandoned logging roads and wildlife trails, ascending three coastal peaks with views across Tillamook Ridge and State Forest.

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

Eight out-and-back segments from a central hub, spanning Vero Beach and Sebastian, with tropical waters, jungles, rugged trails, and 22 bridge crossings

Tough and unpredictable trail course with a mix of out-and-back segments and loops on mostly clockwise routes at Devil's Lake

Challenging 100k course on the Pacific Crest Trail through Siskiyou Mountains, with Mt. Shasta and Cascades vistas highlighting Ashland's terrain

Scenic Finger Lakes hills and valleys, swamplands to hilltops, steep descents, gully rim trails, finishing at the culturally significant Great Hill