Course
Loop courses starting and finishing at Colossal Cave Mountain Park, using sections of the Arizona National Scenic Trail near Vail, 24 miles southeast of Tucson. The trail is well built and rolling, high desert running with wide-open views, and was laid out by Tucson Trail Runners as a relatively fast trail ultra. Aid stations are well stocked and the event is cupless.
50 Mile50 mi
55K55 km
Half Marathon21.1 km
Key dates
- !RegistrationOpen now
- ★Race daySat 5 Dec 2026
Date confirmed with the organiser · entry window checked by RunCalendar
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Save Colossal Vail 50/50 to your season and RunCalendar reminds you the morning entries open and before they close. Free on iPhone, no account needed.
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