Half Marathons in Idaho
Idaho has 6 upcoming half marathons scheduled for 2026: Eternal Surrender 5K, 10K and Half Marathon in Coeur D Alene on August 22, St. Luke's FitOne 5K/10K/Half Marathon in Boise on September 26, Haunted Half Marathon and 5k by Run the Undergrad in Rexburg on October 24, Eternal Surrender 5K, 10K and Half Marathon in Coeur D Alene on October 24, Boise Half Marathon in Boise on November 14, and Boise Half Marathon in Boise on November 26.
Showing all 6
Running
Eternal Surrender 5K, 10K and Half Marathon
Coeur D Alene, ID
Running
Eternal Surrender 5K, 10K and Half Marathon
August 22, 2026
Coeur D Alene, ID
Frequently asked questions
How long is a half marathon?▾
A half marathon is 13.1 miles (21.1 kilometers). It is one of the most popular race distances in the US, attracting over 2 million finishers annually. Browse half marathons on RACE to find one near you.
How should I train for my first half marathon?▾
Most beginner training plans are 10-12 weeks long and gradually build your weekly mileage. A typical plan includes 3-4 runs per week with one long run that peaks around 10-11 miles before race day.
What is a good half marathon time?▾
The average US half marathon finish time is about 2 hours 10 minutes. Beginners often aim for under 2:30, while competitive runners target sub-1:45. Focus on finishing strong rather than a specific pace for your first race.
What are the biggest half marathons in the US?▾
The largest include the United Airlines NYC Half, RBC Brooklyn Half, Disney Princess Half Marathon, and the Rock 'n' Roll series events in Las Vegas, Nashville, and San Diego. You can find all of these on RACE.