50mi Winter ultramarathons in United States (East Coast)

100-mile course on a 7.2-mile loop amid long leaf pines and palmettos, gentle 225-foot elevation per loop, wildlife sightings, and illuminated night sections

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

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

Rugged, relentless terrain across every trail, summiting both peaks with dramatic lake views on Crowders Mountain’s toughest ultra distances

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

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.

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

Mostly singletrack mountain trails with tough climbs, runnable stretches, bluff-line vistas, creek crossings, and a Lula Falls section.

Scenic point-to-point route from the West Ashley Greenway through historic Charleston, crossing bridges and coastal landscapes, self-supported and unmarked

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

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

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

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

Deep snow, dramatic winter conditions, historic drawbridge crossing, and scenic towpath from Wide Water’s Marina in Lockport, NY

Point-to-point ultramarathon along Florida’s Space and Treasure Coasts, with ocean views, historic sites, and passage through beach towns

South Mountain Reservation trails in Maplewood, with a roughly 10-mile wooded loop format for 50K and 50-mile distances.