Spring ultramarathons

Challenging trail courses on Ometepe Island with over 6000 meters of elevation across two volcanoes, technical terrain, dense vegetation, and diverse surfaces.

Four-day, 196.45 km route circling scenic Lake Balaton with solo or relay options

50K, 50-mile, and 100-mile trail races on gently rolling singletrack and logging road loops through Mississippi pine woods.

Scenic loop course through tranquil woodlands, mixing paved and gravel trails on Hawk Ridge, Fox Run, and Owl Creek with rolling hills and moderate climbs.

Steep climbs and technical rocky trails through Caparaó National Park, high-altitude stretches to Pico da Bandeira, forests, waterfalls, and panoramic mountain.

4 miles every 4 hours for 48 hours, solo or team participation options

200 miles of out-and-back tunnel traverses in the UK's longest foot tunnel, flat terrain, constant darkness, minimal lighting, and demanding psychological test

Rugged 2.15-mile forest loop with rocks, roots, wooden walkways, and over 250 feet of elevation gain per lap, finishing at Burnett’s Mound summit.

50-mile trail event in the South Mountain area, with a welcoming, community-driven atmosphere and local trail running and hiking focus

Single-loop trail run through the Croom Tract, following the Withlacoochee River into remote forest with varied terrain and tranquil surroundings

Double-loop course through the Black Mountains, forest trails, summit ridges, river crossings, panoramic views, and ancient churches near Llanbedr

Fairly flat 1.25-mile park loop with frequent finish area passes, ample amenities, and a spectator-friendly setting