Skyline 50k Endurance Run
Castro Valley, United States • 2 Aug 2026
Skyline 50k Endurance Run : Castro Valley, CA
Skyline 50k Endurance Run is a trail event that starts and finishes at Lake Chabot Marina and follows a large loop through East Bay Regional Parks up to Skyline Gate. The event offers two distance options:
- 50K
- 21K
The race is presented by Scena Performance and is described by the organizer as one of the oldest continuously running 50k races in the United States. Course support includes multiple aid stations staffed by local running groups and a Volunteer Safety Patrol at key intersections. Maps, GPX files, and athlete guides are provided for both the 50k and the half marathon.
Logistics published by the organizer include a digital briefing in late July and an in-person bib pickup the day before the race at Sports Basement Berkeley; bib pickup is optional and others may pick up on a runner’s behalf. Post-race items for entrants have included a race shirt, Skyline socks, a finishers medal, and awards given to overall winners and three deep by age group. The event is part of the P-USATF Grand Prix and is listed as a UTMB Index race. Historically, post-race food and beverages have been provided at the finish in some years. Visit the organization's website for the most recent information.