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The MT. TAMMANY 10

United States flag
Delaware Water Gap, New Jersey, United States

calendar_today 20 Mar, 2027

directions_run Running

sell $150.00

The MT. TAMMANY 10

About the Event

Nestled within the rugged terrain of the DWG area, the Mt. Tammany 10 presents an unparalleled challenge for seasoned ultrarunners seeking to test their limits on one of the most demanding courses around. Spanning nearly 40 miles, this grueling event features a relentless series of climbs and descents that will push even the toughest competitors to their absolute physical and mental extremes.
The race begins at the Kittatinny Parking Lot Pavilion, where participants set off towards Dunnfield parking lot before ascending up the Red-Dot trail to reach the summit of Mt. Tammany. From there, runners transition onto a blue-blazed path for about half a mile until they make a sharp left turn and begin their descent down the mountain's steep trails. Crossing over a river at the bottom, competitors head back towards Dunnfield Parking Lot where they will start another ascent up Mt. Tammany.
This arduous journey repeats itself ten times throughout the race, with each loop adding to the cumulative fatigue and testing runners' resilience against relentless elevation changes. Every second, fourth, sixth, eighth, and final tenth lap requires a return to the Start/Finish Pavilion for mandatory check-ins and loop verification, ensuring that no runner is left unaccounted for during this solitary yet communal endeavor.
Throughout these loops, participants will be treated to breathtaking mountain vistas on their climbs and the soothing sounds of rushing water as they navigate through majestic waterfalls along the descent. However, with over 10,000 feet of elevation gain spread across ten hours, runners should brace themselves for a course that is unforgiving in its terrain and steeped in natural beauty.
The Mt. Tammany 10 stands out not just as another tough race but as an experience where every step feels earned and each vista offers a momentary respite from the relentless challenge ahead. It's more than a test of endurance; it’s an invitation to immerse oneself fully into nature while pushing personal boundaries in one of the most satisfying ultramarathons runners can undertake.
With no aid stations available at Dunnfield Parking Area, competitors must rely on their own preparation and support systems for this solitary yet communal journey. The Mt. Tammany 10 is not just a race; it's an odyssey through some of the toughest trails in the DWG area that only those who are truly prepared can undertake.
For more information and to register, visit our official website where you'll find detailed course maps, check-in procedures, and all necessary details for this unforgettable ultramarathon experience.

Races Offered

40 Miler

Mar 20, 2027

straighten

Distance — 64.4K

terrain

Type — Running

timer

05:45

sell

$150.00

Weather History

These values represent the 3-year monthly averages for March in Delaware Water Gap.

thermostat Temperature
0.0° / 11.2°
wb_sunny Feels like
-4.4° / 6.8°
light_mode Avg sunshine hours
8h 21m
water_drop Avg rainfall
3.7 mm
ac_unit Avg snowfall
0.2 cm
air Avg wind speed
11.2 km/h (Light breeze)
opacity Sweat loss rate
Low
terrain Course conditions
Firm and slightly soft
sunny Max UV Index
Moderate (4.0)
humidity_mid Humidity
65.2%
wb_twilight Sunrise
07:09
nightlight Sunset
19:07

About Delaware Water Gap

Learn more about the host city, Delaware Water Gap.

Scenic view of

The Delaware Water Gap is a water gap on the border between the U.S. states of New Jersey and Pennsylvania, southeast of Stroudsburg, where the Delaware River cuts through a large ridge of the Appalachian Mountains.

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Hotels & Places to Stay

Race Results

All-time top performances and historical records for The MT. TAMMANY 10.

Place Name Year Time
🥇 Jason Lantz '16 7:05:18
🥈 Justin Lewandowski '22 7:24:44
🥉 Justin Lewandowski '26 7:28:32
4 Steven Lange '18 7:28:56
5 Ben Nephew '15 7:33:00

Runner Reviews

Read what other athletes have to say about their experience at the The MT. TAMMANY 10.

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