Skyline 50k Endurance Run

The Skyline 50K Endurance Run, held annually in August at Lake Chabot Marina in Castro Valley, California, is the longest-running 50K race in the state and one of the oldest 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 seasoned veterans alike.

Participants benefit from strong community support with well-staffed aid stations and enthusiastic volunteer safety patrols. The event concludes back at Lake Chabot Marina with a plant-based BBQ and beer, emphasizing a fun, inclusive, and environmentally conscious experience. Visit the organization's website for the most recent information.