Trail Running Calendar New Jersey 2025-2026

The Frosty Fat Sass is an annual trail running and hiking event held in West Orange, New Jersey, at the South Mountain Reservation's Turtleback Rock Picnic Area. Scheduled for January 31, 2026, this 9th edition offers participants options to run or hike a 5K loop or take part in 3-hour or 6-hour tim..

The Mahlon Winter Donut Trail Run & Hike is a scenic trail running event held at Saffin's Pond in the Mahlon Dickerson Reservation, Lake Hopatcong, New Jersey. Scheduled for February 8, 2026, it offers three race distances: a 5-mile loop, a 10-mile course consisting of two loops, and a 13.1-mile hal..

The Squatchy Onesie Fest 5K is a fun and unique trail running event held at Ramapo Valley County Reservation in Mahwah, New Jersey. Participants complete a flat, scenic 1.6-mile "lollipop" loop around Scarlet Oak Pond twice to finish the 5K. The course features mostly wide gravel and dirt trails wit..

Squatchapple is a popular trail running event held at South Mountain Reservation in West Orange, NJ, offering distances of 11 miles, 20 miles, 50K, and 50 miles. The race features a challenging course composed of three loops—4, 5.5, and 7 miles—with varied terrain including carriage roads, singletra..

The Livingston Oval Ultra, held in Livingston, New Jersey, is a timed running event featuring 1-hour, 3-hour, 6-hour, and a new 12-hour race distance for 2026. Participants run laps around a USATF-certified, fast, and flat oval course, aiming to cover as much distance as possible within their chosen..

The Mt. Tammany 10 is a challenging ultramarathon held in Delaware Water Gap, New Jersey, featuring an almost 40-mile course with over 10,000 feet of elevation gain. The race consists of 10 grueling loops, each involving a climb to the summit of Mt.Tammany via the Red-Dot trail, followed by a descen..

The Terror of Tammany is a challenging trail running event held at Worthington State Park in Columbia, New Jersey. Featuring two distances, a 30K and a 50K+, the race consists of multiple loops of a 6.7-mile course with approximately 1,750 feet of vertical ascent per loop. The 30K covers three loops..

The Spring SOMO Timed Trail Races take place at South Mountain Reservation in South Orange, New Jersey. This event features a looped trail course of 1.88 miles (just over 3K) that includes single track, pavement, and fire road sections. Runners can choose from multiple race options: 1 loop (3K), 2 l..

The Matzah Miles 5k Trail Run and 1 Mile Family Walk is a festive event celebrating Passover, set to take place in Medford, NJ. Participants can choose between a competitive 5K trail run, a leisurely 1-mile family walk, or a fun 50-yard Kids Dash. The event features a pre-race warm-up, games for chi..

The Wawayanda Trail Fest is a challenging trail running event held in Vernon Township, New Jersey, at Wawayanda State Park. It features multiple distances including a 100K, 50 Mile, 50K, and Half Marathon, all running on a scenic 26+ mile loop course with rhododendron tunnels, marsh bridges, gravel..

XTERRA New Jersey is an off-road multisport event held at the scenic Wawayanda State Park, featuring over 40 miles of trails and a clear lake. Part of the XTERRA World Tour, it offers a variety of races including trail runs (5K to 42K), gravel and mountain bike races, and triathlons such as full dis..

3 Days at the Fair is a multi-day ultrarunning event held at the Sussex County Fairgrounds in Augusta, New Jersey. The race features a certified 1-mile flat loop course composed of pavement and crushed gravel, suitable for various distances including 6, 12, 24, 48, 72, and 144-hour races, as well as..