Trail ultramarathons in New Jersey, United States

Randomly assigned trail loops across South Mountain Reservation, strategic decisions at dusk, and unpredictable routes inspired by the TommyKnocker Ultra

Flat .8-mile park loop with pavement or gravel options, timed format, personal gear area near start/finish, accessible terrain in Westfield, NJ

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

Woodland trails and fire roads across rolling hills with technical and runnable sections, featuring 50K and 50-mile courses in South Mountain Reservation.

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

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

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

5.5-mile dirt loop with few roots, paced for lap consistency, beside Belleplain State Park with wooded South Jersey surroundings.

South Mountain Reservation trails through scenic woods in West Orange, NJ, featuring a 50K route with challenging distance for runners and hikers

Seven loop course with rolling hills, open fields, and New Jersey farmland; over 32 miles on 95% trails and double track in Holmdel Park.

Scenic 100k point-to-point route from Horseshoe Lake, featuring trail and road sections through state parks, lakes, and picturesque New Jersey towns

Looped trail course through South Mountain Reservation, 3-hour and 6-hour timed options, starting and finishing at Turtleback Rock Picnic Area

South Mountain Reservation trails in Maplewood, with a roughly 10-mile wooded loop format for 50K and 50-mile distances.

50-mile trail event in the South Mountain area, with a welcoming, community-driven atmosphere and local trail running and hiking focus

Flat 50k off-road trail course with professional timing, water stops, and finisher medals

Ten climbs and 10,000 feet of elevation gain over nearly 40 miles on the demanding trails of the DWG region, featuring mountain views and waterfalls.

Technical 6.7-mile trail loop with 1,750 feet of ascent around Mt Tammany; demanding 30K and 50K+ distances for seasoned ultrarunners