January ultramarathons in United States (Midwest)

Winter endurance event on the Tuscobia State Trail with 160-mile and 80-mile options for runners, bikers, and skiers in Northern Wisconsin

Scenic rolling trails and winter conditions at Yankee Springs State Recreation Area; 50k course with frequent aid stations

Remote 40-mile winter challenge in St. Croix State Park, self-supported with survival skills tests, cold weather navigation, and essential gear requirements

Triple black diamond 50K ultramarathon on single-track trails through Veteran Acres and Sterne’s Woods, featuring a rugged winter landscape

Cross country trails winding through Caldwell Woods and Bunker Hill, 5 km loops on grassy or paved terrain, ultra and team options, winter forest setting

Rugged multi-loop course through rolling wooded hills, creek bottoms, and pine floors with up to 15,000 feet of elevation change near St. Louis

Two-loop ultramarathon from Emma Carlin, including Ice Age Trail to Whitewater and Scuppernong Trails, remote terrain, self-supported with aid stations

Snowy loop course inspired by the Ode to Laz, dusk-like final lap, unpredictable winter weather, old-school format with no chip timing, virtual option available

Scenic 50K winter course with minimal support, varied trails, and playful elements designed for outdoor enthusiasts

Randomized trail loops through Clinton Lake State Park’s varied terrain, originating from Coneflower Campground, with 24-hour and shorter duration options

4.15-mile loop of moderately technical singletrack through hardwood forest, with rocks, roots and about 400 feet of elevation gain per lap

135 miles of well-groomed, mostly flat snowmobile trail through northern Minnesota, marked intersections, winter wildlife, shelters spaced along the route

Virtual 100-mile challenge across any activity, honoring Global War on Terror service and supporting veteran programs