Inside Trail - Knickerbocker Canyon Trail Run

Event details

The Knickerbocker Canyon Trail Run takes place on March 28, 2026 at American River Overlook Park in Auburn, CA. The event offers four distances:

• 35K (20.8 miles, 4,800' elevation gain)
• Half Marathon (13.3 miles, 3,000' elevation gain)
• 10K (6.1 miles, 1,150' elevation gain)
• 5K (3.5 miles, 650' elevation gain)

The event has a capacity of 400 runners. All races are chip timed using MyLaps and Race Director, with disposable chips attached to the back of each bib. A 6.5 hour time limit applies to the longer distances; all runners must be off course by the published cutoff. Parking is free inside the park and on adjacent streets. Early bib pickup is available the day before at Fleet Feet - Roseville; race morning check-in is at Overlook Park. To be guaranteed a race shirt size, registration must be completed by March 14, 2026.

Course and logistics

Courses run largely on moderately technical dirt trails and fire roads, including single-track along the American River, the historic Western States trail to No Hands Bridge, the K2 training hill, and the Dam Hill switchbacks. Courses are marked with colored surveyor ribbon approximately every 200 meters; blue ribbons mark wrong-way trails. Aid stations provide a variety of food and drinks but no paper cups - this is a cupless event. Runners are advised to carry at least one 20 oz bottle or a reusable cup; reusable cups will be available for purchase at the event. Dogs are allowed on leash; runners with dogs must start from the back of the pack. Visit the organization's website for the most recent information.