Marathon Races in Idaho
Find upcoming marathon races in Idaho — with dates, locations, and direct registration links.
30 upcoming marathon races found in Idaho
Upcoming Marathon Races in Idaho
Half Marathon
Bear Lake Trifecta – Idaho Marathon & Half Marathon
Jun 5, 2026
Saint Charles, ID
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Half Marathon10K
Teton Dam Marathon, Half Marathon, 10k & 5k
Jun 6, 2026
Rexburg, ID
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Spirit of Magic Valley Half MarathonSpirit of Magic Valley 10K
Spirit of Magic Valley Half Marathon - 10K - 5K - Kids 1 Mile
Jun 6, 2026
Twin Falls, ID
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MarathonHalf Marathon
Boise Marathon
Jun 13, 2026
Boise, ID
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MarathonHalf Marathon
Boise Marathon
Jun 20, 2026
Boise, ID
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Race The Wolf Trail MarathonRace The Wolf Trail Half-Marathon
Race the Wolf
Jun 20, 2026
Sandpoint, ID
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Lil Ducky 1 MileHungry Ducky 5k
Duck Donuthon
Jun 20, 2026
Ammon, ID
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5K10K
Christmas 5K/10K/Half Marathon in July - Boise
Jul 11, 2026
Boise, ID
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Marathon1/2 Marathon
Mesa Falls Marathon
Jul 18, 2026
Ashton, ID
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Half Marathon5K
Idaho Falls Marathon, Half Marathon & 5k
Jul 25, 2026
Idaho Falls, ID
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Outlaw Trail Ultra Half Marathon
Outlaw Trail Ultra Half Marathon
Aug 8, 2026
Hansen, ID
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Half Marathon
Salmon Marathon & Half Marathon
Sep 5, 2026
Salmon, ID
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50KMarathon
Priest Lake Marathon
Sep 19, 2026
Priest Lake, ID
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5KMarathon
10K - Individual Age group/open
Sep 23, 2026
Lewiston, ID
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Marathon5K
5K - Individual Age group/open
Sep 23, 2026
Lewiston, ID
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Half marathon5K
Half Marathon - Individual Age group/open
Sep 23, 2026
Lewiston, ID
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Half marathon10K
2026 Northwest Series - Day 6 (ID)
Sep 24, 2026
Lewiston, ID
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Half Marathon10K
Northwest Series Day 5 Marathon, Half Marathon, 10k & 5k
Sep 24, 2026
Lewiston, ID
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Marathon10K
5K - Individual Age group/open
Sep 24, 2026
Lewiston, ID
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Half Marathon10K
FitOne Half Marathon, 10k & 5k
Sep 26, 2026
Boise, ID
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Half Marathon
Legends Never Die Marathon & Half Marathon
Oct 3, 2026
Ketchum, ID
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UltraHalf Marathon
Moscow Mountain Madness 50k, Half Marathon & 5M
Oct 4, 2026
Moscow, ID
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MarathonHalf Marathon
City of Trees Marathon
Oct 10, 2026
Boise, ID
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MarathonHalf Marathon
Hayden Lake Marathon
Oct 10, 2026
Hayden Lake, ID
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MarathonHalf Marathon
Idaho Running Day
Oct 17, 2026
Boise, ID
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Half Marathon10K
Halloween Hustle Half Marathon, 10k & 5k
Oct 25, 2026
Coeur dAlene, ID
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1 Mile Run/Walk5k Run/Walk
ZD30 The Summit (1 Mile, 5K, and 10K, 1/2 Marathon, 30 Mile Ultra)
Nov 7, 2026
Boise, ID
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Boise Half Marathon
Boise Half Marathon
Nov 14, 2026
Boise, ID
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Half Marathon
Race to Robie Creek Half Marathon
Apr 17, 2027
Boise, ID
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Half Marathon10K
Boise River Marathon, Half Marathon, 10k & 5k
May 2, 2027
Boise, ID
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