Jefferson
Trail Running Calendar near Jefferson 2026-2027
Explore the top trail runs near Jefferson for 2026-2027! We've gathered 47 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.
September 2026
October 2026
Test your limits on a flat one mile loop at the Sussex County Fairgrounds. Choose from 6 to 72 hour timed races or certified marathon and 50K distances with full kitchen and shower access.
Community 5K and related races at Garrett Mountain in Woodland Park, NJ, raising funds for the Fred Torres Memorial Scholarship Fund.
Trail races at Jungle Habitat in West Milford NJ featuring a 13.2 mile half, a 6.6 mile 10K plus loop, and a 3.4 mile 5K plus with cupless aid stations.
A community 5K at Duke Island Park on October 10, 2026, run on a flat, paved trail alongside the Raritan River. Proceeds support Family & Community Services of Somerset County, which provides mental health and addiction services.
Looped running at Saddle River County Park on Oct 11 2026 with options from 2 miles to 60K, aid stations, official timing, and awards.
Loop-based races at Livingston Memorial Oval include timed runs, a marathon, a half marathon, and a Last Person Standing event on 0.44-mile laps.
Technical trail races in Harriman State Park featuring a rugged half marathon and a steep 10K with substantial elevation gain and marked singletrack.
Community 5K at Garret Mountain in Woodland Park supporting Autism awareness, with vendors, free gifts, $25 registration, and medals for special needs children.
A hilly 5K trail race on 10/25/2026 at The Barnyard Sanctuary in New Jersey that passes pastures and rescued farm animal enclosures with proceeds to the sanctuary.
USATF New Jersey 8K Cross Country Championship at Natirar Park in Peapack, NJ on October 25, 2026 with open and youth 8K divisions and published entry fees.
A Spartan obstacle-course weekend at Sunflower Valley Farm with Sprint, Super, Kids races, workshops, and Hurricane Heat events from Oct 31 to Nov 1 2026.
November 2026
A community 5K and 1 Mile walk at Central Park of Morris County on November 8, 2026, with in-person and virtual options supporting local housing services.
Trail runs of 10K and 5K at Hillside Park on November 8, 2026 to benefit a free mammography program, with on-site food, water, timing and age-group awards.
Experience the diverse terrain of South Mountain Reservation with a looped trail race offering 5K, 10K, and half marathon distances. Enjoy a mix of single track and fire roads with support provided at regular aid stations.
A 5 miles lollipop loop trail race in Lewis Morris Park, Morristown NJ, run mostly on the Yellow Trail with roughly 600 feet of elevation gain. The event limits entries to 120 runners, uses cupless stations and hemp bibs, and offers free course pre..