50K Winter ultramarathons in United States (East Coast)

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

Flat rail trail with gentle inclines, sub-1500 feet elevation gain, downtown Farmville start, High Bridge crossings, generous 100k cutoff

Smooth, rolling singletrack on a no-repeat 50K with wooded loops, changing scenery, and around 1,600 feet of elevation gain.

Mostly trail route with 4,000 ft elevation gain, rocky technical sections, waterfall views, and a final steep canyon ascent in distinctive Georgia scenery.

Looped single-track trails with roots, rocks, rolling hills, short technical stretches, and fire road sections through northern Virginia

50k and 100k winter ultras on a relatively flat rail trail, with gentle inclines, low elevation gain, and two crossings of High Bridge

Technical singletrack winding through rocky outcrops, dramatic cliffs, and winter landscapes in Hanging Rock State Park’s mountainous terrain

Certified 50K on a fast multi-loop out-and-back course, with smooth pacing rhythm and start/finish aid access each loop.

50K and 50-mile road ultra on repeated 3.33-mile Prospect Park loops, with a spectator-friendly format and frequent aid access

7.75-mile loop with hard-packed trails, challenging technical sections with oak tree roots, and 90% shaded canopy coverage

Flat, point-to-point road course along Florida’s S.R. A1A, with Atlantic coastline views from Jacksonville Beach to the Ponce Inlet Lighthouse.

Seven loop course with rolling hills, open fields, and New Jersey farmland; over 32 miles on 95% trails and double track in Holmdel Park.

Flat and fast 10k loop course through Wakulla Springs State Park, featuring scenic freshwater springs and historic film backdrops

Flat, USATF-certified 10k road loop in Wakulla Springs State Park with ample volunteer support and scenic surroundings

Out-and-back 50k route with flexible turnaround points, festive atmosphere, and emphasis on holiday spirit

2.45-mile loop with mixed trail and path, moderate elevation gain, minimal aid, variable New England weather, and classic low-frills ultrarunning format

Coastal route from Big Lagoon State Park to Fort Morgan, with soft sand, pavement, rolling bridges, exposed causeways, and emerald-water views.

Scenic, tree-lined trails through First Landing State Park with a mostly flat, two-loop course on hard-packed dirt, gentle hills, and wooden bridges.

Tree-shaded single track and gravel trails through Palmetto Bluff’s maritime forest, with scenic and potentially muddy Lowcountry terrain

Winding winter trails through Lakewood Nature Preserve prairie, moonlit overnight course starting and finishing at a rustic barn with fire pits and warm aid