Yuma Territorial Marathon, Half Marathon, 10k and Team Relay
About this race
Starting at Cocopah Casino & Resort and running through scenic areas like Somerton and San Luis, Arizona, not only offers a beautiful backdrop for the race but also gives runners a chance to experience the charm of the desert southwest and the rural communities of southern Arizona.
Due to the favorable elevations and weather, the course is conducive to setting your best times and provides an excellent opportunity to qualify for the Boston Marathon as this course is certified by the USATF. With minimal elevation changes and the opportunity to run downhill at the start, this race is an ideal setup for achieving personal best times. The out-and-back course design provides a sense of familiarity for runners, which can be both mentally reassuring and strategically advantageous. The slight uphill portion near the finish line adds an exciting challenge for participants to conquer.
The course starts at Cocopah Casino & Resort and runs on Southbound shoulder of US Highway 95. Runners leave the Cocopah Indian Reservation and pass through Somerton, Arizona. Marathoners will continue through Gadsen, Arizona and into San Luis, Arizona city limits. All runners will return back on the Northbound shoulder of US Highway 95 finishing back at the Cocopah Casino & Resort. This race will bring you through the beauty of the desert southwest and through the rural communities of southern Arizona.
Entry Fees:
- Full Marathon - $105 (Active Military and Per Family Member - $75)
- Team Relay Marathon - $250/team (Active Military and First Responder - $125)
- Half Marathon - $65 (Active Military and Per Family Member - $35)
- 10K Run - $45 (Active Military and Per Family Member - $25)
Join fellow runners on January 31, 2026 for the Yuma Territorial Marathon, Half Marathon, 10k and Team Relay. It's a fantastic Marathon, Half-Marathon, 10K featuring a flat and fast course in Somerton.
Pick your distance
Running
Marathon
The race is marked off each mile, with hydration stations at almost every marker. There will be a couple of first aid stations on the course as well. Runners may be asked to withdraw from the race if they do not reach the turnaround point by 10:00 AM. The course closes at 1:00 PM.
Half Marathon
The race is marked off each mile, with hydration stations at almost every marker. There will be a couple of first aid stations on the course as well. Runners may be asked to withdraw from the race if they do not reach the turnaround point by 10:00 AM. The course closes at 1:00 PM.
10K
The race is marked off each mile, with hydration stations at almost every marker. The course closes at 1:00 PM.
Team Relay
The team relay is a 4-member relay during which each member runs one leg of the marathon course. Military /First Responder Pricing *Requires all team members be active military/first responder or immediate family members of active duty/first responder with at least one active duty/first responder participant. The race is marked off each mile, with hydration stations at almost every marker. There will be a couple of first aid stations on the course as well. Runners may be asked to withdraw from the race if they do not reach the turnaround point by 10:00 AM. The course closes at 1:00 PM.
Weather Overview
These values reflect historical conditions on the race dates in Somerton in 2026, from Open-Meteo archive data.
About Somerton
Yuma Territorial Marathon, Half Marathon, 10k and Team Relay takes place in Somerton, Arizona, United States. The local timezone is America/Phoenix.
Reviews
Done this event?
If you've participated in this event, share your experience with other runners
🏃 Plan Your Next Race in Somerton
Find upcoming events by distance:
- 10K Run Events in Somerton The most popular local distance in Arizona.
- Somerton Half Marathons Top-rated 21.1K courses in the Somerton area.
- Marathons in Somerton Scenic 42.2K routes and Somerton Boston qualifiers.
- Somerton Running Calendar 2026 See all upcoming race dates.
Race information has been sourced from the event's official website and other publicly available resources. For the most up-to-date details, please refer to the official website directly. If you notice any incorrect or missing information, don't hesitate to reach out to us by email.