April ultramarathons in United States (Northeast)

Jeep trails and singletrack paths through Mt. Toby’s varied terrain, early-season race atmosphere

123-mile point-to-point crossing with mixed trail and road, a long, demanding effort across one of the nation’s smallest states.

Single track and gravel loops at Jacobsburg State Park, 450 feet of elevation change per lap, options for 3-hour or 6-hour duration

Reverse-direction loop course through Wompatuck State Park, 8-hour ultramarathon format, trails starting and finishing at campgrounds

Flexible course with single loop or up to 12-hour endurance challenge, optional weighted backpack, fundraising for Folds of Honor Western PA

Repeated 50km loops on mixed trail surfaces, with about 1,300 feet of climbing per loop and changeable Central New York spring weather

1.88-mile circuit at South Mountain Reservation blending single track, pavement, and fire road, starting and ending at Bear Lane by the dog park

Hilly 50k route over rugged dirt roads and pavement in Vermont, 3,726 feet of elevation, unpredictable weather, and well-stocked aid stations.

Flexible course with single loop or up to 12-hour endurance challenge, optional weighted backpack, fundraising for Folds of Honor Western PA

3.1-mile varied trail loop completed hourly, flexible distance and pacing, supportive atmosphere with no DNFs or penalties

Flat, certified looped course with chip timing and a six-hour limit; only completed laps count toward total distance

Rugged, technical singletrack on rolling woodland terrain, challenging trails accessible only during race weekend at Forever Farm in Alburtis, PA

Three 10.5-11 mile loops on rolling, rocky Metacomet Trail singletrack and double-track, with uneven footing and constant ups and downs.

Scenic 50k route from Sunken Meadow on Long Island’s North shore through towns and trails to Heckscher State Park, including a pass under Sunrise Hwy

Challenging remote forest trails in the Pennsylvania Wilds, with rugged dirt terrain, raw scenery, and a no-frills grassroots atmosphere

33-mile urban route across four boroughs with over 3,500 feet of elevation, 90 stair sets, city streets, bridges, parks, and dirt trails

One-mile park loop course with 24-hour run or walk options, flexible pacing, and a well-stocked aid station at the start/finish

Twisty, rocky 50K and 50-mile routes at Blue Hills Reservation, starting and finishing at Houghton’s Pond; challenging navigation through rugged terrain.