Yuma Territorial Marathon & Half Marathon

Saturday, January 25, 2025 • Somerton, AZ • Course Map

With the exception of a brief downhill stretch at the start and an uphill as runners make their way to the finish line, Somerton’s Yuma Territorial Marathon & Half Marathon features a mostly long, flat straightaway out-and-back course along the shoulder of Arizona Highway 95, from the casino resort at the Cocopah Indian Reservation out through Somerton and back.

The half marathon takes runners from the Cocopah Resort south and then west along Highway 95 to the turnaround point just past Lakin Drive; from there, those running the half then head back along 95 to the finish line back at the resort, while those running the full marathon continue on along 95 down to the full turnaround near Gadsden Estates.

Runners in both races will see some of the southwestern desert’s most starkly beautiful scenery, with its wide-open spaces and desert resorts.

Sunset in Yuma, Ariz. (Photo by Christian Dory/flickr)

Sunset in Yuma, Ariz. (Photo by Christian Dory/flickr)

Race Weather & Climate

Located in the southwestern corner of Arizona, just over 11 miles southwest of Yuma, the city of Somerton typically experiences mild to moderately cool weather conditions in the mid-winter season, and mostly dry weather throughout the year.

In January, temperatures average between 41°F and 68°F, while precipitation amounts average just under half an inch for the month. On the day of the race (Jan. 25), the average low is 41°F and the average high is 70°F.

Past Results

See the Yuma Territorial Half Marathon results here.

Course Map

See the Yuma Territorial Half Marathon course map here.

Starting Time

  • 7:00 AM – full marathon
  • 7:20 AM – half marathon
  • 7:40 AM – 10K


  • $35 and up for the half marathon
  • $75 and up for the full marathon
  • $35 and up for the 10K
  • $10 military discount available


To reserve your spot in the winter 2025 running of Somerton’s Yuma Territorial Marathon or Half Marathon race, register online at RunSignUp.com here.

Official Race Website



Ever run in the Yuma Territorial Half Marathon? Share your impressions here, or post your review in the Comments below.

See more races in: January, Arizona

2 comments… add one
  • Nicholas Gonzalez January 10, 2017, 2:55 am

    Can you please add a picture of 2017’s finishing medal. Thanks! Need some extra motovation!

  • Doreen Keith January 8, 2016, 5:00 pm

    Does this race allow half marathon walkers? There are a few of us wanting to walk.


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