Ruth Anderson Memorial Endurance Run

The Ruth Anderson Memorial Endurance Run is a prestigious running event held annually in San Francisco, California, with the next edition scheduled for October 11, 2025. This endurance run features multiple race distances, including 50 miles and 100 kilometers, and takes place on a scenic 4.5-mile loop around Lake Merced. The event has a rich history, having been established in 1986, and is known for its supportive atmosphere and challenging course.

Participants can expect well-organized aid stations and a chance to set personal or course records in a beautiful setting. Visit the organization's website for the most recent information.