Interstate 17 - Closter, NJ

AUG
14
2027
A 17 mile trail race at State Line Lookout in Closter NJ featuring four mile technical loops, rock scrambles, stocked aid stations and significant elevation with serious hazards.
Sat 14 Aug 2027
17 miles

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Interstate 17 Trail Run

The Interstate 17 Trail Run is a 17 mile trail race at State Line Lookout in Closter, NJ, held on 08/14/2027. The course was founded in 2017 and covers significant terrain with over 5000 ft of elevation change. Organizers state there are locations on the trail where falls can cause death or serious injury; participants are warned that the race carries substantial risk. No awards or medals are provided.

The route begins with a one mile out-and-back on a closed road to separate the field, followed by a four mile loop of rugged technical trails that is run four times. Runners complete three loops counterclockwise and a final loop clockwise. Competitors must check in at the start/end of each loop to have a time card punched.

Trail features are described by mile sections and include semi technical rock strewn dirt trails, steep descents with jagged stairs and switchbacks, boulder filled scrambles that require use of hands, singletrack dirt sections, and a rocky shore with a waterfall leading to a cliff ascent. The final loop reverses the initial loop.

Aid stations are located at miles 1, 5, 9, and 13 and are listed as fully stocked with water, sports drink, soda, candies, oranges, chips, pretzels and more. The course notes recommend carrying personal hydration because some sections may require both hands. Visit the organization's website for the most recent information.

Events nearby

A scored cross country 5K at Van Cortlandt Park on November 15, 2026, open to ages 8 and up, run on wooded trails with on-site awards and race-day amenities.
A community 5K at Inwood Hill Park on November 26, 2026, with proceeds to the Inwood Food Pantry, personalized bibs by 11/1, and medals for the first 700 finishers.
A community 5K and free Kiddie Dash at Alley Pond Park with in-person and virtual options and proceeds supporting the Never Stop Running Foundation.
Trail party at South Mountain Reservation on November 28, 2026 with 5K, 10K, 25K, 50K and Kids 1M options on mixed carriage roads and technical singletrack.
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