Quicksilver Trail Challenge
San Jose, United States • 25 Oct 2025
The Quicksilver Trail Challenge, hosted by the Quicksilver Running Club in San Jose, California, is an annual trail running event held in late summer or early fall at Almaden Quicksilver County Park. It features a half marathon, a 10K race, and a free one-mile kids' fun run. The courses traverse scenic single-track trails and fire roads through historic mining territory, oak forests, and open meadows, offering views of the Santa Clara Valley and Santa Cruz Mountains. The event welcomes both beginner and experienced trail runners, providing a challenging yet beautiful running experience. Proceeds support local charities, and all finishers receive medals and swag. Visit the organization's website for the most recent information.