Sierra Azul Trail Challenge

San Jose, United States • 18 Apr 2026

The Sierra Azul Trail Challenge will take place in San Jose on Saturday 18 April 2026. You can run between 5 and 31 miles. Visit the organization's website for the most recent information.

Race information

31 mi
50k
26 mi
Trail Marathon
20 mi
20 Mile
13 mi
Half Marathon
7 mi
7 Mile
5 km
Visit the organization's website for the most recent information.
Trail runs nearby

Experience a piece of railroad history at this event in Fremont's Quarry Lakes Regional Recreation Area. Run a flat course on the historic Western Pacific Trail with distances including a half marathon, 10K, and 5K.

Experience a scenic trail run around Lake Chabot and the surrounding hills of Castro Valley. With distances from a 50 yard dash to a 50K ultramarathon there is an event for everyone at this regional park.

Experience the hills of Del Valle Regional Park in Livermore with a flat 5K or hilly 10K and half marathon. All participants receive a custom medal and t-shirt with professional chip timing included for all distances.

Experience the coastal beauty of the Bay Area Ridge Trail with distances ranging from a 50 yard dash to a 50K ultramarathon. Runners enjoy expansive views of the Pacific Ocean and the Santa Cruz Mountains.