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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.
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