The Calero Trail Run (Spring) is an annual trail running event held at Calero County Park in San Jose, California. Scheduled for May 31, 2025, this race offers a variety of distances, including a Half Marathon, providing runners with a challenging yet scenic experience through the park’s diverse landscapes.
The Half Marathon course features approximately 755 meters (2,477 feet) of elevation gain over 13.1 miles, traversing single-track trails, rolling hills, and dirt paths. Runners will navigate through oak woodlands and open meadows, offering panoramic views of the surrounding area. The course is marked with colored ribbons to guide participants along the route.
The event is organized by Troy’s California Trail Runs and includes multiple race distances: Kids Run, 1 Mile, 5K, 10K, 15K, Half Marathon, 25K, Trail Marathon, and 50K. All races, except the Kids Run, start at 8:00 AM PDT, with the Kids Run beginning at 7:30 AM. A trail briefing is held at 7:45 AM.
Participants can register online or on race day, with the Half Marathon entry fee set at \$85 for online registration and \$95 for race-day registration. All finishers receive a commemorative medal, and aid stations are available throughout the course. The event is known for its well-organized logistics and supportive community atmosphere.
