Boise is the most popular city to host and run a half marathon in Idaho.
Idaho Half Marathon Calendar
Browse all Idaho Half Marathons in 2024-2025 by month and by city below. For each race, you’ll find the history of the half marathon and the course, the most recent year’s course maps, elevation profiles, runner reviews, pricing, and how to sign up.
We dedicate hours every month searching for races to include in the Idaho Half Marathons calendar. If you happen to see any half marathon not included, contact us at [email protected] to submit your race.
Filter Idaho Half Marathons
Race Size
Difficulty
Scenery
Type
Perfect For
Distances
Filter Idaho Half Marathons
Race Size
Difficulty
Scenery
Type
Perfect For
Distances
April 19, 2025
1,000-10,000 runners
Boise, Idaho
- Half Marathon, Trail
April 26, 2025
100-500 runners
Coeur d'Alene, Idaho
- 10K, 5k, Half Marathon, Road
June 5, 2025
1-100 runners
Saint Charles, Idaho
- Half Marathon, Marathon, Trail
August 30, 2025
100-500 runners
Pocatello, Idaho
- 10K, 5k, Half Marathon, Marathon, Road
September 24, 2025
1-100 runners
Lewiston, Idaho
- 10K, 5k, Half Marathon, Marathon, Road
September 25, 2025
1-100 runners
Lewiston, Idaho
- 10K, 5k, Half Marathon, Marathon, Road
October 4, 2025
1-100 runners
Ketchum, Idaho
- Half Marathon, Marathon, Trail
Running in Idaho
FAQ
What are the most popular Idaho half marathons?
The Coeur d’Alene Half Marathon is one of Idaho’s most popular half marathons with just over 2,000 finishers.
What are the best Idaho half marathons for beginners in 2024?
We recommend the Coeur d’Alene Half Marathon, the Bear Lake Half Marathon, and the Mesa Falls Half Marathon.
We like the Coeur d’Alene for its crowds and flat, lakeside course.
We like the Bear Lake Half Marathon in St. Charles as the course actually crosses into three different states: Idaho, Wyoming, and Utah. An amazing race particularly if you’re trying to cross off racing in all 50 states.
The Mesa Falls Half Marathon in Ashton frequently comes up as one of the most scenic with a course along the Warm River.
What’s the best month to run a half marathon in Idaho?
September is the most popular month to run a half marathon in Idaho.
What are the most popular cities to run Idaho half marathons?
