The John Lawson Tamalpa Challenge
Santa Venetia, United States • 12 Oct 2025
The John Lawson Tamalpa Challenge is a cross-country running event held annually at China Camp State Park in San Rafael, California. The 2025 edition features three races, each approximately 4.2 miles long, on a course of mostly rolling single-track trails with a short stretch of asphalt. The event honors John Lawson, a Tamalpa Runner who passed away in 2000. Races are divided by age and gender categories, including separate starts for women under 60, men under 60, and a combined race for men and women aged 60 and above. The race atmosphere is community-focused, with limited parking and a cap on participants to preserve the park's environment. Visit the organization's website for the most recent information.