October ultramarathons in United States (East)

Certified one-mile loop of pavement and crushed gravel at Sussex County Fairgrounds; flat, fast and highly runnable for 50K to 100 miles.

One-mile loop on grass and mulched paths, winding around ponds and open fields with light elevation gain and continuous on-course support.

Woodland course through Roosevelt Forest, tree-lined trails and natural scenery in historic Stratford, CT

Rugged Pisgah singletrack featuring iconic trails like Black Mountain, Turkey Pen Gap, Laurel Mountain, and Pilot Rock

10-mile loop on Blue Wing, Koasati, and Whoa Mule trails with flat, muddy paths, tree roots, and views of Lake Bistineau and cypress forests

Three-loop 50K on North Georgia singletrack, with 5,000 ft of climbing, rocky ascents, technical stretches, stream crossings and waterfalls.

104-mile out-and-back on Westmoreland Heritage and West Penn Trails, 7,392 feet of elevation gain, Morosini Reserve and parks in peak autumn colors

24-hour USATF sanctioned run on a rubberized track in Mt. Pleasant, featuring shaded lanes, day and night laps, and a lively, social race atmosphere

6.5-mile figure-eight loop through Prince William Forest Park, with singletrack, fire road, rolling terrain, and about 650 feet of climb per loop.

Scenic Ouachita Mountains route featuring forest roads, rugged jeep trails, and 12,000 feet of elevation across runnable, deceptively tough hills

Multiple-loop 50K course through Coopers Rock woodlands, with 687 feet elevation gain per 10K segment and a sustained Category 4 climb

Extensive USNWC trails, single-track climbs, and riverside paths; 50k or 50-mile options with looped courses and technical terrain; Pump House Biergarten start/

Forested 4-mile singletrack loop with rolling terrain, snowmobile trails, fields, rugged logging roads, and 300 feet of elevation gain per lap

Rugged 10K singletrack loop in Coopers Rock State Park, 687 feet elevation gain per lap, wooded terrain, Category 4 climb, festive start/finish area

Historic Bartram Trail route from downtown Franklin into the mountains, with steep climbing, 8,500+ feet of gain, and a scenic Wayah Bald section.

Hilly jeep road loops on 1North Adventure Trails, hourly 3.5-mile circuits, night running emphasis, flexible pacing, festive atmosphere, pancake breakfast

Flat, one-mile crushed gravel loop with gentle grass shoulder, soft and rock-free terrain, welcoming park setting, seamless lap tracking

Looped 1-mile course through scenic Damascus parkland, festival atmosphere with live music, food trucks, and adjacent campsites

50K on the Croom Hiking Trail through longleaf pine forest, scrub oak hills, creek bottoms, and cypress ponds in central Florida

50K mountain course on Lake George’s scenic shores, five summit ascents, 9,000 feet of elevation change, rugged terrain, and limited exit points