Idaho Half Marathons
Official Walker Friendly Half Marathons in Idaho
18:32 mile / 4 Hour Minimum course time limit= (W)
Symbol only applies to half marathon events
Does NOT meet the Walker Friendly 4 hour minimum (18:32 / mi) = Not Walker Friendly (NWF)
Trail Half Marathons 21k (T)
Date
Location
No January Half Marathons in Idaho in 2026 at this time
No February Half Marathons in Idaho in 2026 at this time
Sat Mar 15, 2025
Caldwell, ID
Sat Apr 18, 2026
Boise, ID
Sat May 3, 2025
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Sat May 17, 2025
Sat May 24, 2025
Sun May 25, 2025 (W)
Boise River Marathon, Half Marathon, 10k, 5k
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Famous Idaho Potato Marathon & Half Marathon
Redfish Lake Lodge Memorial Half Marathon, 10k, 5k
Boise, ID
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Boise, ID
Stanley, ID
Coeur d'Alene, ID
Sat Jun 7, 2025
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Sat Jun 7, 2025
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Thu Jun 5, 2025 (W)
Rexburg, ID
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Shoshone Falls, ID
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Garden City, ID
Sat July 19, 2025
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Sat July 26, 2025 (W)
Ashton, ID
Idaho Falls, ID
Sat Aug 30, 2025
Pocatello, ID
Sat Sep 13, 2025
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Wed Sep 24, 2025
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Thu Sep 25, 2025
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Sat Sep 27, 2025
Priest Lake Marathon, Half Marathon, 10k, 5k
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Mainly Marathons NW Series Marathon, Half Marathon, 50/10/5k (day 5)
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Mainly Marathons NW Series Marathon, Half Marathon, 50/10/5k (day 6)
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Priest Lake, ID
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Lewiston, ID
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Lewiston, ID
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Twin Falls, ID
Sat Oct 5, 2024
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Sun Oct 5, 2025
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Sat Oct 11, 2025
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Sat Oct 14, 2023
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Sat Oct 18, 2025
Rush Creek Stampede Half Marathon & 5k
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Moscow Mountain Madness Half Marathon, 50k, 5mi
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Hayden Lake Marathon, Half Marathon, 10k
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Cambridge, ID
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Moscow, ID
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Hayden, ID
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Lewiston, ID
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Boise, ID
No November 2025 Half Marathons in Idaho at this time
No December 2025 Half Marathons in Idaho at this time
Idaho Half Marathon Calendar event dates in dark grey are delinquent dates not updated by the race organizer yet. We strive to have dates 1 year out for Idaho half marathons, but have no control of when they set, announce or update their dates.
Idaho Half Marathons
The Idaho Half Marathon Calendar is a complete simplistic listing of Idaho half marathons. Currently the Idaho half marathon schedule has 2025 Idaho half marathons and 2026 Idaho half marathons as they roll in. Idaho half marathons 2025 & Idaho half marathons 2026 also identify trail half marathons and walker friendly half marathons by a (T) symbol and a (W) symbol. The (T) means it is a TRUE trail half marathon 21k (off road, switchbacks, etc) and a (W) means it is truly "official walker friendly" requiring the half marathon to allow a minimum of 18:32 mile pace, minimum 4 hours for participants to finish the 13.1 mile distance.
The Idaho half marathon calendar features a complete listing of Boise half marathons, Idaho Falls half marathons, Nampa half marathons, Meridian half marathons, Pocatello half marathons, Caldwell half marathons, Coeur d'Alene half marathons, Twin Falls half marathons, Lewiston half marathons, and many more 1/2 marathons in ID.