Washington · Olga

Orcas Island

Founded in 2016 by Rainshadow Running, Orcas Island 100 covers four 25-mile loops of single-track through old-growth forest on Orcas Island in Washington's San Juan archipelago, with roughly 26,000 feet of gain. Each loop crests Mount Constitution, and runners who climb the 53-foot stone tower on all four laps earn Tower Club recognition at the awards ceremony. The February timing brings cold and mud; the 36-hour cutoff is strict. In 2025, Eric Yan won in 20:56 and Audrey Lawrence in 22:15.