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)

Race information

50 mi
50 Miler
55 km
55k
13 mi
13 Miler
13 mi
13 Miler Night
Visit the organization's website for the most recent information.
Trail runs nearby

Everyone Runs hosts the Veterans Day Catalina State Park 10.6- and 5.3-mile trail races plus a 5k road run in Tucson, Arizona. The event takes place at Catalina State Park, with two trail distances (10.6 miles is two loops of the 5.3-mile c..

Event overview The Thanksgiving XC Classic is scheduled for November 27, 2025, at Reid Park, 900 S Randolph Way, Tucson, AZ. The event includes these distances: 5K - two-loop cross-country course, separate men's and women's races 1.5 mile..

Run three 50 mile ultras across southern Arizona's scenic AZ Trail in one series, raising funds for the Arizona Trail Association. Finish all three within 45 hours to earn a custom finisher garment and cumulative certificate.

The 20th Annual Vail Jingle Trail takes place in Tucson, Arizona, and offers two festive races: a 5K and Santa’s Little Helper 1K, highlighted for Saturday, December 13, 2025. The event embraces a holiday spirit with decorated courses, chee..

Empire Ranch Run is a trail race at the Empire Ranch in the Las Cienegas National Conservation Area, Sonoita, Arizona. It offers a 10k Trail Run, a 5k Run/Walk, a 1 Mile Walk/Run, and a Children's Mile for ages 14 and under. The family-frie..

The TMC Old Tucson Trail Run is a popular annual event held at Old Tucson Studios in Tucson, Arizona. It features a 4-mile trail run and a family-friendly 1-mile walk/run, with an additional kids' 1-mile race for participants 14 and under...