Calero Trail Run - Spring
San Jose, United States • 30 May 2026
Calero Trail Run (Spring) at Calero County Park
Calero Trail Run takes place on Saturday, May 30, 2026, at Calero County Park, 23205 McKean Rd, San Jose, CA 95120. The event offers a range of trail distances and uses trails within Calero County Park and nearby Rancho Cañada del Oro.
Distances offered include:
- Kids Run
- 1 Mile
- 5K
- 10K
- 15K
- Half Marathon
- 25K
- Trail Marathon
- 50K
Course terrain includes single track, dirt paths, and significant hills. Several course ascent figures are provided for planning: the 5K has about 252 ft ascent, the 10K about 1,187 ft, the 15K about 1,751 ft, the half marathon about 2,477 ft, and the 25K about 2,726 ft. The 50K follows extended loops with additional out-and-back mileage and is described as suitable for heat training with oak trees and exposed sections.
Aid stations and water points are located on-course, with multiple toilets at the start/finish aid station and a single first-come first-served commode at the Rancho Cañada del Oro aid station. Drop bags are permitted at the start/finish for 50K runners. Parking at Calero Park is free and carpooling is encouraged. Volunteers are requested for aid stations and receive a free future race credit. Online registration is available through the morning of the race; entry fees vary by distance and races are non-refundable with transfer policies for future events. Visit the organization's website for the most recent information.