January ultramarathons in United States

Point-to-point ultramarathon on remote single track from Hobe Sound Beach to Lake Okeechobee, crossing diverse Florida ecosystems and rugged terrain

Smooth, climate-controlled indoor track at the Olympic Oval; five-hour timed event on a repetitive loop circuit

Lakefront trails through Arkansas Bend Park, skirting the Colorado River and limestone bluffs, with natural terrain and unique endurance formats.

Groomed forest trails on a three-lap loop, limited course marking with self-navigation, relaxed format with route flexibility

Dynamic loops at Shaffer Bend Park along limestone bluffs and the Colorado River, sun-bleached trails, lush scenery, and manageable elevation per loop

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

Looped trail course over sun-bleached limestone bluffs, riverside paths, and Colorado River views, with moderate elevation changes and stargazing opportunities

Tranquil Wekiwa Springs trails, challenging ultra course, scenic views, local wildlife, solo or relay options, festival atmosphere with on-site aid

Rugged Lost Coast landscapes, remote backcountry gravel and pavement, starting from Horse Creek Mountain trailhead near Shelter Cove

Scenic loop course at Holland Park with 6- and 12-hour endurance options, lap tracking with rocks, passing local hotspots

Scenic trail routes through Hacienda Hills with Bay Area views and challenging elevation at Almaden Quicksilver County Park

Scenic 6.2-mile trail loop at Bradley Palmer State Park, repeatable up to five times, on beautiful park trails with a relaxed, non-competitive atmosphere.

Shaded singletrack weaving through oak hammocks and classic Florida scenery in Withlacoochee State Forest

Rugged, root-laden single-track trails through Cameron Park’s valleys and hills, 450 feet of elevation gain per 8K loop, cool winter temperatures

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

Flat, open route on the Northeast Texas Trail with gravel, dirt, pavement, and grass sections through small towns and rugged backcountry

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

Looped course with flexible lap totals and early start option, welcoming atmosphere to begin the year with fellow runners

Classic early-season New England trail ultra with deep regional roots and longstanding community tradition.