Idaho has 15 active marathons this year. Races are most common in September, October, and May. 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, Boise River 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 — 12.9% BQ and Pocatello Marathon — 12.7% BQ.
| Idaho Marathons |
Course
|
PR Score
|
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|---|---|---|---|---|---|---|---|
Boise River MarathonBoise, ID05/02/2027 |  Rolling Hills 283 Finishers |
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Famous Idaho Potato MarathonBoise, ID05/15/2027 |  Mostly Flat264 Finishers |
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Coeur d Alene MarathonCoeur d' Alene, ID05/30/2027 | Rolling Hills523 Finishers |
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Bear Lake Idaho MarathonBear Lake, ID06/04/2027 | Rolling Hills35 Finishers |
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Teton Dam MarathonRexburg, ID06/05/2027 |  Hilly97 Finishers |
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Boise MarathonBoise, ID06/20/2027 | Mostly Flat206 Finishers |
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Mesa Falls MarathonAshton, ID07/17/2027 |  Downhill155 Finishers |
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Idaho Falls MarathonIdaho Falls, ID07/24/2027 | Rolling Hills78 Finishers |
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Pocatello MarathonPocatello, ID09/04/2027 | Downhill213 Finishers |
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Salmon MarathonSalmon, ID09/04/2027 | Downhill26 Finishers |
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Malad Valley MarathonMalad City, ID09/11/2027 | Hilly14 Finishers |
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Priest Lake MarathonPriest Lake, ID09/18/2027 | Hilly31 Finishers |
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Hayden Lake MarathonHayden Lake, ID10/09/2027 | Hilly86 Finishers |
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City of Trees MarathonBoise, ID10/10/2026 | Rolling Hills266 Finishers |
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Idaho Running Day MarathonBoise, ID10/17/2026 | Rolling Hills67 Finishers |
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