Trail Running calendar near Princeton 2025-2026

Hit the trails at South Mountain Reservation on January 10, 2026 for NJ Trail Series SOMO Winter 3, with 5K, 10K and 13.1 mile looped courses over hills and single track. Aid stations, on site registration and a giveaway add winter race day..

Join the ninth annual Frosty Fat Sass at South Mountain Reservation, a fundraiser for the South Mountain Conservancy. Choose a 5K, timed 3 or 6 hour loop or rucking division on a rugged, rocky 5K trail.

Hit the trails at the YETI OR NOT Snowshoe Invasion at Mountain Creek on January 31, 2026. Ride the lift to the top for a scenic 5k or untimed last mile welcoming runners, walkers and first time snowshoers. Bring your own snowshoes.

Join the Morris County Empanada Trail on March 29 in Morris Plains NJ with 5K and 10K runs over scenic mixed terrain. Entry includes a long sleeve shirt, finisher medal and an empanada with proceeds benefiting the Arthritis Foundation.

Join the Squatchy Onesiefest 5K on Feb 14 in Mahwah NJ for a playful, flat 5K around Scarlet Oak Pond or a shorter fun run. Costume lovers earn awards for top finishers in onesies, with on trail aid and a cozy race village.

Join Febapple Frozen on Feb 21, 2026 in South Orange / Maplewood, NJ for a winter trail challenge on a 10 mile loop through South Mountain Reservation, with distances from 10 miles to 50 miles. Aid stations, official timing and event swag m..

Run four 5k trail races at Elephant Swamp Trail in Monroeville, NJ from Feb 22 to Mar 15, 2026. Series scoring, end of series awards and a finisher medal at each race plus hot chocolate and a discount for full series.

Run or hike rugged woodland trails at the Mahlon Winter Donut Trail Run and Hike, with 5 and 10 mile options around Saffin's Pond. Trail markers keep you on course and the event runs rain, snow, or shine for a true winter adventure.

Squatchapple puts scenic singletrack and carriage road loops in South Mountain Reservation to the test with distances from 11 miles to 50 miles. Support the South Mountain Conservancy and earn a handcrafted wood medal and race swag.

Naked Bavarian is an ultra trail at Blue Marsh Lake in Leesport, PA with 20 and 40 mile options on mostly single track and gravel. Enjoy rugged climbs, supportive aid stations and a German style finisher memento.

Tackle a scenic 34 mile out and back along New Jersey's Lenape Trail, from South Mountain Reservation through Newark and back, with skyline views and varied terrain. This self supported adventure asks runners to carry their own gear and nut..

Run the 4 Leaf Clover 5K at Bethpage State Park on March 8, 2026. Enjoy scenic soft trails, a free kiddie Clover run and a one week virtual 5K, plus a themed shirt while supporting the Never Stop Running Foundation.

Tackle rugged trails in French Creek State Park with a challenging Half Marathon or a fun 10k loop. Enjoy technical singletrack, scenic lake views and big climbs for a true trail running day in Elverson, PA.

Take on MT. TAMMANY 10, an almost 40 mile looped trail challenge in the Delaware Water Gap with ten summit climbs and more than 10,000 feet of elevation gain. Technical, rugged terrain and river crossings make for a bold, scenic test.

Terror of Tammany! on March 22, 2026 in Columbia, NJ is a rugged looped trail challenge with 30K (three 6.7 mile loops) and 50K+ (five loops). Expect technical climbs, a campground start and finish, strict time limits, and finisher awards.

Explore rugged North Jersey wilderness in The Fools Adventure, a 10 hour foot ROGAINE with over 100 checkpoints across scenic, rocky terrain. Test your map and compass skills as you navigate for the best route and enjoy big views.

Tackle technical, rugged trails and steep climbs at Big Bear Squatch North in Bear Mountain NY on April 4, 2026. Choose a challenging 10K or a grueling half marathon, with proceeds supporting the New York New Jersey Trail Conference.

Scenic loop at Jacobsburg State Park on a 5 mile mix of single track and fast gravel. Choose single lap, 3 hour or 6 hour formats, bring your own hydration and enjoy a finisher pin plus sustainable medals supporting local conservation.

Join the Bunny Trail 5K at Bethpage State Park for a family friendly run starting on a grassy polo field and winding onto scenic soft trails. In person and virtual entries plus a free kiddie run support the Never Stop Running Foundation.

Spring SOMO Timed Trail Races in South Orange this April on a 1.88 mile loop offer one loop or 1, 3 and 6 hour timed options. Expect single track, pavement and fire road through scenic South Mountain Reservation.