50mi January ultramarathons in United States

Louisiana's longest continuous trail through Kisatchie National Forest, well-marked 50-mile route with frequent aid stations for runners and mountain bikers

Three-section winter course with open flat stretches, runnable dirt roads, and a technical but runnable finish; loop format with easy access between laps.

Out-and-back ultra across Catalina Island with rugged terrain, Pacific Ocean views, and possible bison sightings from start and finish in Avalon.

Scenic, mostly fast trails with rolling singletrack, local landscapes, and a signature climb to Raptor Ridge on a 50-mile course suitable for all levels.

100-mile and 50-mile ultra events with a festival-style atmosphere, camping, tailgating, classic rock, beer, and a huge bonfire.

Rugged Santa Monica Mountains singletrack on the Backbone Trail, with ocean views and nearly 11,000 feet of climbing on the 50-mile course.

Point-to-point road and trail ultra on five paved multi-use paths, from Edgewater to Lake Monroe, with smooth footing and lakefront views.

Scenic out-and-back along riverwalks and urban trails, passing whitewater, parklands, and local landmarks, with Southern cuisine at aid stations

Rugged Nevada desert ultra on a demanding 12.5-mile loop: 90%+ singletrack, technical terrain, steep climbs, fast descents, and Black Mountain.

Scenic desert course along Arches National Park with technical slick rock, sandy sections, and sweeping views of Moab cliffs and La Sal Mountains

Fast, mostly flat 4.85-mile loop combining paved bike paths and wide dirt trails along the American River Parkway, crossing Guy West and Watt Bridges

Scenic ultra through Tosohatchee and Seminole Ranch, mossy palm groves, soft ground, rooty and muddy trails, and seasonal water crossings.