December ultramarathons

Four-day, 100 km route featuring towering dunes, open plains, shifting desert colors, and nightly stays at a 5-star lodge

Rugged volcanic trails on São Miguel with demanding elevation across Tronqueira, Fogo, and Sete Cidades, featuring dramatic cliffs and panoramic island views

Technical mountain terrain above 1,600m in Tak province, with pine forests, ridge lines, stream crossings, waterfalls and sea-of-fog views.

Technical multi-lap course through Oak Mountain State Park, starting and finishing by Tranquility Lake

1.1-mile loop with 340 feet of climbing per lap, steep ascents, runnable sections, and a field descent on double track logging road

Steep 0.35-mile loop with 89 meters elevation gain per lap, repeated up to 100 times for Everest-equivalent climbing and cumulative elevation awards

Certified 2.022-mile soft chat loop at former golf course, multiple timed races, strict cutoff rules, fully stocked aid, RV camping and tent space

Multi-stage trail run across Santo Antão featuring steep climbs, volcanic trails, terraced valleys, coastal views, and lush ridges

Central Nelson start, Maitai River Trail and historic Dun Mountain Trail, with native forest climbs and exposed ridgelines above Tasman Bay.

Flat, sea-level loops with minimal elevation gain and a lively event village atmosphere

Challenging 2.5-mile loop every 45 minutes, elimination format with no breaks, last runner standing wins, endurance-focused test

Scenic Lake Ray Roberts routes with well-groomed single-track and technical segments featuring roots, rocks, and varied North Texas terrain

Classic Northern California terrain: flowing singletrack, rolling dirt paths, stout climbs, heat, exposure, and wide-open vistas.

Technical 10.5-mile loop with rolling hills and diverse terrain through Caloosahatchee Regional Park’s scenic Green, Black, and Blue trails