Idaho Marathons
7 upcoming marathons across Idaho, updated nightly. Want radius search and maps? Open these in the Race Finder.
September 2026
- Sat 9/12Malad Valley MarathonMalad City, ID 路 Marathon 路 Half Marathon 路 10K 路 5K 路 1 Mile
- Sat 9/19Priest Lake MarathonPriest Lake, ID 路 50K 路 Marathon 路 Half Marathon 路 10K
October 2026
- Sat 10/10Hayden Lake MarathonHayden Lake, ID 路 Marathon 路 Half Marathon 路 10K 路 5K 路 Other
- Sun 10/11City of Trees MarathonBoise, ID 路 Marathon 路 Half Marathon 路 10K 路 5K
- Sat 10/17Idaho Running DayBoise, ID 路 Marathon 路 Half Marathon 路 10K 路 5K
May 2027
- Sun 5/2Boise River MarathonBoise, ID 路 Marathon 路 Half Marathon 路 10K 路 5K
- Sat 5/15YMCA Famous Idaho Potato Marathon & Fun RunsBoise, ID 路 Marathon 路 Half Marathon 路 10K 路 5K
More Idaho: 5K Races 路 10K Races 路 Ultras 路 All Idaho races 路 Browse by state