Logo

The Mt. Tammany 10

Blairstown, United States • 21 Mar 2026

The Mt. Tammany 10 is a challenging ultramarathon held in Delaware Water Gap, NJ, featuring an almost 40-mile course with over 10,000 feet of elevation gain. Runners complete 10 grueling loops, each involving a climb to the summit of Mt.

Tammany via the Red-Dot trail, a descent on the Blue-Blaze trail, and a stretch along the Appalachian Trail. The race starts and finishes at the Kittatinny Parking Lot Pavilion, with loop check-ins and aid stations at Dunnfield Parking Area. Known for its tough terrain, stunning mountain views, and scenic waterfalls, this event is designed for experienced ultrarunners seeking a true endurance test. Visit the organization's website for the most recent information.

United States New Jersey Blairstown

Race information

Website Registration
40 mi
10000 m+
Mt. Tammany 10 - Approximately 40 Miles
Visit the organization's website for the most recent information.
Trail runs nearby

Water Gap 50k

Milford - 25 mi from Blairstown

Water Gap 50k and Half takes place in Milford, Pennsylvania, within the Delaware Water Gap National Recreation Area. The event offers 50K and 25K distances, with the McDade Trail serving as the course—a 32-mile point-to-point route through the Gap, mixing rail-trail cinder paths with rolling singlet..

NJ Trail Series One Day

Augusta - 17 mi from Blairstown

...

The NJ Trail Series One Day is a multi-day ultrarunning event held at the Sussex County Fairgrounds in Augusta, New Jersey. Scheduled from October 2 to 5, 2025, it features a variety of race options including 72, 48, 24, 12, and 6-hour timed races, as well as marathons and 50K distances. The course..

Hot Chili Challenge 8 Mile Trail Run

Andover - 11 mi from Blairstown

The Hot Chili Challenge 8 Mile Trail Run, 5K & Kids Fun Run takes place in Andover, New Jersey. The event features an 8 mile trail run and a 5K for adults, plus a Kids Fun Run for ages 5-12. The atmosphere blends competition with a chili-themed, community race vibe, including on-site homemade chili,..

The Tough Cookie Trail Run 5K

Lake Hopatcong - 17 mi from Blairstown

The Tough Cookie Trail Run 5K is a trail-running event held at Prospect Point Park in Lake Hopatcong, New Jersey. The course is a 5K on local trails, inviting runners, walkers, and hikers to join a morning of strength, spirit, and community. The event emphasizes resilience, nature, and giving back,..

The Long Run - Fall Back

Wind Gap - 20 mi from Blairstown

The Long Run – Fall Back takes place at Jacobsburg State Park in Wind Gap, PA, with the start/finish at the Equestrian Parking Lot near Sobers Run trailhead. The event offers a 5-mile loop through a mix of single-track and gravel trails, with about 450 feet of elevation gain. Runners can also enter..

FEAR Trail Fest 5 Miler

Morristown - 28 mi from Blairstown

FEAR Trail Fest 5 Miler is a trail race held at Lewis Morris Park in Morristown, New Jersey. The event features a 5-mile lollipop loop on the park’s Yellow Trail, with about 600 feet of total elevation gain. The course starts with a wide Patriots Path section, then transitions to single-track for th..