100mi trail ultramarathons in United States (Mid-Atlantic)

Rugged, moderately difficult out-and-back laps on an unpaved rail trail with 1000 feet elevation change per lap and uneven terrain.

Scenic trail courses in Canandaigua featuring 100-mile and 50-mile ultrarunning challenges

103-mile loop through Pine Creek Gorge and the Grand Canyon of Pennsylvania, with over 20,000 feet of climbing, rugged singletrack, and remote wilderness trails

Flat, scenic miles along the historic Erie Canal towpath, starting at Wide Water’s Marina and crossing Lockport’s draw bridges

Scenic loop course through woodlands and fields, quasi-technical trails with 300 feet elevation gain per loop, wooden bridges, and stream crossings

Wide crushed stone rail trail through Pine Creek Gorge with dramatic cliffs, abundant wildlife, early autumn foliage, and gentle 2% grade

Steep climbs and descents, substantial elevation changes, varied trail surfaces, sunrise views, scenic forest singletrack, and a challenging loop format

Challenging mountain courses through national forests west of the Shenandoah Valley, featuring fall foliage and panoramic vistas on demanding terrain.

Stunning Wawayanda State Park trails with 100 miler, 100K, 50 miler, and 36-hour race options; generous cut-off times; nonprofit support

Trail ultramarathon festival through the untamed wilderness of Seven Bends State Park

Laid-back loops around Dryden Lake Park with a 7.5-mile course, basic support, shared snacks, and flexible goals of 100 miles or 30 hours

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

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

Rolling hills and national scenic beauty on the Virginia Creeper Trail with easy crew and spectator access

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

100-mile trail race through New River Gorge National Park, featuring singletrack, rail trails, river descents, waterfalls, ghost towns, and historic sites

Point-to-point out-and-back course from Creeper Cottages to the Pepsi Machine and back, with no time limits on Damascus trails

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

Out-and-back 7.5-mile loops at Dryden Lake Park, 100-mile or 30-hour formats, basic aid, winter conditions, low-key community atmosphere