Join fellow runners for an unforgettable experience along Acadia National Park's scenic loop road on Mount Desert Island, where you'll take in breathtaking views of Maine's rocky shores, mountains, and dramatic cliffs throughout the 13.1-mile course. The Mount Desert Island YMCA is committed to keeping this 41,000-acre park pristine, so they encourage you to bring your own reusable cup or water bottle to one of the six hydration stations (though paper cups will be available if needed). Note that the route may change due to closures or construction, and there's no race day packet pickup.