2026 Old Pueblo Endurance Runs
The 2026 Old Pueblo Endurance Runs will take place on Saturday, March 7, 2026, in Sonoita, Arizona, set against the stunning backdrop of the Santa Rita Mountains. The event, held at the historic mining site of Kentucky Camp, offers a challenging and scenic trail ultramarathon experience through land rich in history and natural beauty. On this date, Sonoita is expected to have mild temperatures, with daytime highs around 60°F (15°C) and nighttime lows dropping to about 40°F (4°C). Participants can expect a mix of forest service roads and singletrack trails, with elevation gains and scenic views of Mount Wrightson, a prominent landmark that dominates the skyline throughout the course.
What is the event's history and significance?
The Old Pueblo Endurance Runs are one of the oldest trail ultramarathons in Arizona, having been founded in 1985 by local trail running pioneers. The event has been continuously held on the flanks of the Santa Rita Mountains, offering runners a journey through land that has been traversed by early Native American trails, ranchers, miners, and migrants.
What distances are available for this event?
- →25 Mile Trail Run
- →50 Mile Trail Ultramarathon
What is the course like?
The course is a 25-mile loop on forest service roads and singletrack trails, part of the Arizona Trail system. The 50-mile runners complete two loops. The course starts and finishes at the historic mining site of Kentucky Camp, with elevation ranging between 4,031' and 6,232'. The average grade is 6%, and the course includes a notable descent through Fish Canyon from Melendrez Pass to Cave Creek Aid Station. Mount Wrightson, standing at 9,452', is a key landmark visible throughout most of the run.
What are the time limits for each distance?
- →25 Mile: 7 hours
- →50 Mile: 15 hours
What awards and prizes are offered?
Top 3 male and female finishers in each distance receive special awards. All finishers receive awards, sponsor swag, and an invitation to a post-race cookout.
Are there any partnerships or special entry opportunities?
- →Southern Arizona Triple 50: Completing three 50-mile ultras in Southern Arizona in one season qualifies for special prizes and discounted rates. More Info ↗
- →Angeles Crest 100 Partnership: 1st and 2nd place male/female finishers in the 50 Mile receive Sterling Silver Tickets (guaranteed entry, registration fee still applies) to Angeles Crest 100. More Info ↗
- →PhoMo 50K Partnership: 1st place male/female at PhoMo 50K receive free entry to Old Pueblo 50 Mile. 1st place male/female in Old Pueblo 25 Mile receive free entry to PhoMo 50K. More Info ↗
What are the registration requirements?
Participants must be at least 18 years old to enter. Discounts are available for Native Americans, active duty military, law enforcement, firefighters, and first responders by contacting the race director via the official website. No refunds are offered, but up to 5 deferrals to the following year are available on a first-come basis.
What is included in the registration?
All finishers receive awards, sponsor swag, and an invitation to the post-race cookout. Runners also receive a reusable, collapsible cup at packet pickup, sponsored by Hammer Nutrition, making this a cupless event.