April ultramarathons in United States (Midwest)

Smooth, fast 2-mile loop at Majestic Farm through woods, meadows, and lakeside stretches, with a heated barn hub for long timed efforts.

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

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

Mixed-surface 1.7-mile loop in scenic Luhr County Park with flexible breaks and a six-hour personal distance format

Multiple ultra distances on a 10-mile single-track loop with rolling hills, prairie, creek crossings, 1,600 feet elevation gain per loop, and frequent aid stops

Six-loop, 100.2-mile course through rugged Bluff Country trails in the Zumbro River Bottoms, featuring scenic landscapes near Theilman, Minnesota

Looped course in Greensfelder County Park with 80%+ singletrack, technical roots and rocks, steep grades, rolling hills, and Ozark foothill scenery.

Gently downhill 33.5-mile course along the Kal-Haven Trail from Kalamazoo to South Haven, featuring Southwest Michigan scenery and well-stocked aid stations.

55-mile spring relay from Oshkosh to downtown Green Bay, with lakeside shoreline, Calumet County countryside, and a long Fox River Trail section

Dirt road loops through the Flint Hills near Manhattan, Kansas, featuring over 1,500 feet of elevation change per loop and multiple course aid stations.

Certified loop course with officially measured 50K and 100K routes, built for fast benchmark performances and a competitive race-day atmosphere.

Over 5000 feet of elevation gain, tricky river crossings, technical riverside trails, and two named climbs in a challenging Ohio 50k

Rugged point-to-point 50 miler on the Knobstone Trail, with steep climbs, rolling ridges, forest backcountry, sweeping vistas and 10,000 ft gain.

Challenging 50K on gravel roads and farmland, featuring rolling hills, flat stretches, rural views, and the steep Ivan the Terrible ascent

2.5-mile loop on Columbia’s D1 NCAA Cross Country course, well-groomed and slightly undulating, with solo and relay options up to 24 hours

Rugged forest trails along the Mississippi River, challenging terrain, multiple distance options, and scenic views inside Loud Thunder Forest Preserve

Scenic 16.6k loop course at Whitewater State Park, with river crossings, meadows, bluff vistas, and varied terrain completed three times for 50k

Winding single tracks, rolling hills, and blooming spring scenery through Veteran Acres and Sternes Woods in Crystal Lake