Colossal Vail 50/50

The Colossal Vail 50/50 is a trail running event held near Vail, Arizona, starting and finishing at Colossal Cave Mountain Park. It offers multiple distances including a 50-mile ultra, 55K, and half-marathon options with both day and night courses. The race features fast, rolling terrain on recently completed sections of the Arizona National Scenic Trail, showcasing high desert landscapes and scenic vistas near the Santa Rita Mountains.

Aid stations are well-stocked and supported by experienced volunteers, with a focus on environmental responsibility as a cupless event. Awards include engraved railroad spikes for ultra finishers and wooden awards for half-marathoners. The event benefits the Arizona Trail Association and encourages camping and local lodging. Visit the organization's website for the most recent information.