The Mt. Tammany 10
Blairstown, United States • 21 Mar 2026
Event
The MT. TAMMANY 10 is an ultra-distance trail event in the Delaware Water Gap, New Jersey area on March 21, 2026. The course covers an almost 40.0 mile route composed of ten repeated ascents and descents of Mount Tammany, with more than 10,000 feet of total elevation gain. The format consists of ten loops; runners must return to the start/finish pavilion for check-in and loop verification at the end of every 2nd, 4th, 6th, 8th, and 10th loop.
Course layout and conditions
The Start/Finish is at the Kittatinny Parking Lot Pavilion. Each loop runs from there to the Dunnfield parking lot, follows the Red-Dot trail to the Mount Tammany summit, continues on a short section of blue-blaze trail, then descends Mount Tammany, crosses the river, and uses the Appalachian Trail for about 1/3 mile back to the Dunnfield parking lot. Aid will be posted in the Dunnfield parking area.
The course description notes steep, technical terrain and advises runners to expect difficult, slow miles; it also lists mountain views, waterfalls, and the sound of rushing water as features along the route. Medical or safety outcomes mentioned include possible falls, bruises, strains, sprains, and cuts for those on difficult terrain. Visit the organization's website for the most recent information.