Colossal Vail 50/50
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Colossal Vail 50/50
The Colossal Vail 50/50 takes place on Saturday, December 5, 2026, at Colossal Cave Mountain Park’s La Posta Quemada Ranch in Vail, Arizona, about 24 miles southeast of Tucson. The event is presented by Fleet Feet Tucson and uses sections of the Arizona National Scenic Trail between Saguaro National Park and the foothills of the Santa Rita Mountains.
The event offers multiple distances on a course made of two out-and-back segments along the Arizona Trail:
- 50 mile course using both out-and-back segments.
- 55K course returning to the ranch for an almost 34 mile finish.
- Daytime Half-Marathon out-and-back to the south with a short road and arroyo section.
- Nighttime Half-Marathon out-and-back to the north overlapping the 50 mile finish.
The trail is mostly rolling hills and open desert with moderate climbs and fast singletrack. Aid stations are fully stocked with water, soft drinks, electrolyte replacement drink, sweet and salty foods, and sandwiches; runners who need specific items must carry them or use crew and drop bags. The event is cupless; reusable cups are available for purchase or participants may bring their own. Pacers are not allowed without prior approval. Time limits are set for each distance, for example the 50 mile event has a 15 hour limit. Average December temperatures in the Vail area are about 64 degrees high and 37 degrees low. Visit the organization's website for the most recent information.
