Semiquincentennial Endurance Series 2026

The Semiquincentennial Endurance Series is a virtual event held July 4–10, 2026, with multiple distance options: 5K, 25K, 250 Minute Challenge, and 250K. Participants can run, walk, hike, or ruck any distance anywhere on any surface of their choosing during event week. An official event t-shirt is available at registration with a $10 discount when purchased as part of race registration.