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Inside Trail - Knickerbocker Canyon Trail Run

Auburn, United States • 28 Mar 2026

The Knickerbocker Canyon Trail Run, hosted by Inside Trail Racing, takes place in Auburn and Cool, California, starting at American River Overlook Park. Scheduled for March 28, 2026, the event offers four distances: 5K, 10K, Half Marathon, and a challenging 35K ultramarathon. Runners traverse the historic Western States trail, including the iconic No Hands Bridge and the demanding K2 training hill, with varied terrain featuring single-track trails along the American River and steep switchbacks known as Dam Hill.

The course is technical and scenic, designed to test endurance while providing an enjoyable trail running experience. Aid stations supply energy gels, snacks, and hydration, and the event promotes environmental responsibility by being cupless. The race has a 400-runner capacity and offers awards, technical shirts, and a supportive volunteer community. Visit the organization's website for the most recent information.

United States California Auburn

Race information

Website Registration
35 km
35k
21 km
Half Marathon
10 km
10k
5 km
Visit the organization's website for the most recent information.
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