Colossal Vail 50/50

Colossal Vail 50/50, presented by Fleet Feet Tucson, is a trail ultramarathon near Vail, Arizona, starting and finishing at Colossal Cave Mountain Park. The event offers 50 miles, 55K, and two 13-mile options (day and night half-marathons), all on a rolling high-desert section of the Arizona Trail east of Tucson. The course emphasizes fast trails, scenic vistas, and supporter-led aid stations, designed for both first-time ultras and seasoned runners.

Special features include five aid stations (four used twice), engraved railroad-spike finishers’ awards for ultras, a wooden half-marathon trophy, and a CUPLESS policy with reusable cups. Bees may be present; come prepared. Visit the organization's website for the most recent information.