Skyline 50k Endurance Run

The Skyline 50K Endurance Run, held annually in August at Lake Chabot Marina in Castro Valley, California, is one of the oldest continuously running 50K races in the U.S. The course features a large loop through the scenic East Bay Regional Parks, reaching Skyline Gate. Known for its welcoming atmosphere, the race is ideal for first-time ultrarunners and competitive for veterans.

Aid stations are well-supported by local running groups, and volunteers provide guidance and encouragement along the route. The event concludes back at Lake Chabot Marina with a plant-based BBQ and beer. Skyline 50K is part of the USATF Grand Prix and a UTMB Index race. Visit the organization's website for the most recent information.