September ultramarathons in Wyoming, United States

Demanding 50K in southeast Wyoming: rugged jeep roads, three climbs of Jelm Mountain, out-and-back from 7,600 to above 9,600 feet.

Looped ultramarathon route through Wyoming’s Red Desert, historic South Pass City start and finish, remote steppe ecosystems, sweeping landmark views

Flat dirt and gravel loops beside the Tongue River, 30-hour limit, rustic amenities, variable Wyoming weather, and scenic park surroundings at 3,770 feet