13 Mile Trail Race Top Down San Jose, CA   May 17, 2025

The 13 Mile Trail Race Top Down is a half marathon race within two parks, Almaden Quicksilver Park and Sierra Azul Open Space Preserve. This race starts at the Mt. Umunhum parking lot and will take you from the top of the exclusive Mt. Umunhum down to the Hacienda Entrance parking lot of Almaden Quicksilver Park (course ascent: 1,909 feet). 5.5 Hour Time Limit We hope that you can join us.