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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, New Jersey, featuring an almost 40-mile course with over 10,000 feet of elevation gain. The race consists of 10 grueling loops, each involving a climb to the summit of Mt.

Tammany via the Red-Dot trail, followed by a descent on the blue blaze trail, crossing a river, and a short stretch on the Appalachian Trail. Runners face tough terrain with rocky trails, steep climbs, and descents, making it a true test for seasoned ultrarunners. The course offers stunning mountain views and waterfalls, with aid stations at key points.

The event starts and finishes at the Kittatinny Parking Lot Pavilion. 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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