Colossal Vail 50/50
Vail, United States • 6 Dec 2025
Event
The Colossal Vail 50/50, presented by Fleet Feet Tucson, is a trail running event near Vail, Arizona, using sections of the Arizona National Scenic Trail east of Tucson. The event offers multiple race distances and is the first leg of the Southern Arizona Triple 50. Proceeds benefit the Arizona Trail Association. Registration discounts are available for Arizona Trail Association members, veterans, Native Americans, and youth.
Course, services and logistics
The race starts and finishes at Colossal Cave Mountain Park / La Posta Quemada Ranch and uses recent AZT trail sections between Saguaro National Park-East and the foothills of the Santa Rita Mountains. The route includes out-and-back segments; 50-mile runners cover the 55K course before continuing north for an additional out-and-back segment. There are five aid stations on the courses, four of which are used twice by runners. The event is CUPLESS; reusable or personal cups are required. Skratch Labs is the event hydration sponsor. Finishers receive physical awards: engraved railroad spikes for ultra finishers and wooden finisher awards for half-marathoners. Daytime and nighttime half-marathon options use separate 13-mile courses; completing both earns a special award. Camping near the start/finish is encouraged and lodging is available in Tucson and nearby Vail. Refunds are not offered; partial registration credit may be transferred under stated conditions. Visit the organization's website for the most recent information.
- 50 miles
- 55K
- 13 miles (day)
- 13 miles (night)