October ultramarathons in United States (East Coast)

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

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

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

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.

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

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

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

Flat 5K out-and-back loops on the tree-lined Cecil Field Recreational Trail, with Tent City access and a fixed-hourly-start 50K format

Autumn timed ultra in New York’s Capital District, 6-hour solo format with distance-based buckles amid vibrant seasonal foliage

31 miles of Connecticut roads with stops at five donut shops, a course featuring hot pavement, challenging back roads, and a 7-hour cutoff

Urban team run between Jacksonville Wawa stores, item collection and community support with relaxed, non-competitive routes

1-mile loops with 300 feet gain on technical, rocky trails at South Mountain Reservation; steep Lenape climbs, switchback descents, 3 or 6 hour format

Scenic 2-mile loop through Kakiat Park with 650 feet of vertical gain per lap and Hudson Valley fall foliage views