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Skyline 50k Endurance Run

Castro Valley, United States • 3 Aug 2025

The Skyline 50K Endurance Run is one of California's oldest and most celebrated 50K races, taking place annually in August at Lake Chabot Marina in Castro Valley. This event is designed for both novice and experienced ultrarunners, featuring a scenic course that loops through the East Bay Regional Parks. Participants benefit from excellent aid station support provided by local running groups and a vibrant atmosphere, making it enjoyable for all skill levels. Runners receive a race shirt, special socks, and a finisher's medal, with awards for top performers in various age categories. The event promotes a plant-based ethos, concluding with a celebratory BBQ and beer. Visit the organization's website for the most recent information.

United States California Castro Valley

Race information

Website Registration
UTMB 20K UTMB 50K
50 km
50k
21 km
21k
Visit the organization's website for the most recent information.
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