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Which races deserve the top spot in each state for 2026?
Idaho has 14 active marathons this year. Races are most common in October, May, and June. Course terrain for these courses is most often rolling hills or hilly. Typical race day temperatures range from 44°F to 70°F.
Popular races include the Coeur d Alene Marathon, Famous Idaho Potato Marathon, and City of Trees Marathon. 7 certified courses can be great Boston qualifier options. Races with the best Boston qualifying percentages include the Famous Idaho Potato Marathon — 11.1% BQ and Pocatello Marathon — 10.0% BQ.
| Idaho Marathons |
 Course
|
PR Score
|
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|---|---|---|---|---|---|---|---|
Boise River MarathonBoise, ID05/02/2026 | ![]() Rolling Hills![]() 143 Finishers |
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Famous Idaho Potato MarathonBoise, ID05/16/2026 | ![]() Mostly Flat![]() 280 Finishers |
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Coeur d Alene MarathonCoeur d' Alene, ID05/24/2026 | ![]() Rolling Hills![]() 412 Finishers |
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Bear Lake Idaho MarathonBear Lake, ID06/05/2026 | ![]() Rolling Hills![]() 35 Finishers |
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Teton Dam MarathonRexburg, ID06/06/2026 | ![]() Hilly![]() 97 Finishers |
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Boise MarathonBoise, ID06/20/2026 | ![]() Mostly Flat![]() 109 Finishers |
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Mesa Falls MarathonAshton, ID07/18/2026 | ![]() Downhill![]() 167 Finishers |
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Idaho Falls MarathonIdaho Falls, ID07/25/2026 | ![]() Rolling Hills![]() 82 Finishers |
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Pocatello MarathonPocatello, ID09/05/2026 | ![]() Downhill![]() 251 Finishers |
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Salmon MarathonSalmon, ID09/06/2025 | ![]() Downhill![]() 26 Finishers |
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Priest Lake MarathonPriest Lake, ID09/19/2026 | ![]() Hilly![]() 31 Finishers |
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City of Trees MarathonBoise, ID10/10/2026 | ![]() Rolling Hills![]() 266 Finishers |
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Hayden Lake MarathonHayden Lake, ID10/10/2026 | ![]() Hilly![]() 84 Finishers |
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Idaho Running Day MarathonBoise, ID10/17/2026 | ![]() Rolling Hills![]() 67 Finishers |
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