October ultramarathons in United States (Northeast)

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

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

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

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

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

Challenging 100k along Pennsylvania's Black Forest Trail with over 13,400 ft of climbing, midnight start, rugged forests, and shifting toughest sections

Scenic 31-mile lake loop on mostly runnable trails, accessible terrain with moderate challenge, plentiful themed aid stations staffed by local runners

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

Rolling hills, creek crossings, and varied terrain through Glenroy Preserve’s historic landscape and Civil War-era landmarks

10.48-mile pine barrens trail loop in Rocky Point, with ultramarathon distances from 50K to 150 miles and flexible start times

Self-supported 200-mile road race across New Jersey, from High Point to Cape May, with runner-created routes on pedestrian-open roads.

Historic Midstate Trail routes through mountains, fields, and river crossings, with border crossings and New England autumn scenery

Scenic road loop circling a Finger Lake, mostly flat to rolling terrain with challenging climbs including the renowned Bopple Hill

Rugged single-track ultramarathons on the Gerard Hiking Trail, with over 17,000 feet of elevation gain through Oil Creek State Park's scenic, demanding terrain