Backyard ultramarathons

Winding singletrack and grassy pasture loops by day, gravel road course at night on a historic Manitoba family farm

24-hour, 12-hour and 100 km racing on Ryavallen’s 400 m track in Borås, with a consistent surface, regular direction changes and round-the-clock support.

Mostly flat 3.5-mile gravel loop on Back Cove Trail, circling a tidal estuary with scenic views and a short paved bridge crossing

4.167-mile loop on single track and ski trails with moderate elevation in Alaska's Government Peak Recreation Area, Hatcher Pass

Recurring 6.706 km loop every hour on the hour, following Lazarus Lake’s backyard ultra format; no set finish line or distance

4.167-mile trail loop by day, paved park road by night, hourly starts, no outside aid, last runner standing format inspired by Laz Lake

4-mile loop completed every hour, elimination on missed cutoff, continuing until a single runner remains

Backyard Ultra format on scenic Casper Mountain Trails, endurance challenge with last runner standing rules and accessible spectator viewing

Backyard Ultra on an exceptionally flat, highly runnable loop near A.C. Tvedt Park, with a last-runner-standing format and community festival backdrop.

Scenic 4.17-mile trail loops on cross-country ski trails at 5,500 feet, through wildflowers, forests, marshlands, and past a mountain lake at Silver Star

1-mile loops with 300 feet of gain, last man standing format honoring the 2nd Battalion 4th Marines

Rugged Concord woods course with diverse, demanding terrain and intense conditions

Looped 5k trail course with intense heat, Last Man Standing and 50K ultramarathon options, capped at 100 runners

Wooded Mt. Hoevenberg forest loops in Lake Placid, a backyard ultra in the Adirondacks with scenic woodland terrain and repeated laps.

Backyard ultra on the scenic Skäggenäs Peninsula: a repeating loop of forest trail, gravel, farmland, and asphalt.