Half Marathon Races in Idaho

Find upcoming half marathon races in Idaho — with dates, locations, and direct registration links.

31 upcoming half marathon races found in Idaho

Upcoming Half Marathon Races in Idaho

5K+8

Aug 23

Popsicle 5K/10K/Half - Boise

Sun, August 23, 2026

Boise, ID

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Half Marathon

Sep 5

Salmon Marathon & Half Marathon

Sat, September 5, 2026

Salmon, ID

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Marathon+4

Sep 12

Malad Valley Marathon

Sat, September 12, 2026

Malad City, ID

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5K+4

Sep 12

Running-1 Mile - Individual Age group/open

Sat, September 12, 2026

Malad City, ID

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50K+3

Sep 19

Priest Lake Marathon

Sat, September 19, 2026

Priest Lake, ID

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5K+3

Sep 23

Half Marathon - Individual Age group/open

Wed, September 23, 2026

Lewiston, ID

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Marathon+3

Sep 23

10K - Individual Age group/open

Wed, September 23, 2026

Lewiston, ID

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Marathon+3

Sep 23

5K - Individual Age group/open

Wed, September 23, 2026

Lewiston, ID

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5K+3

Sep 23

50K - Individual Age group/open

Wed, September 23, 2026

Lewiston, ID

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Half Marathon+2

Sep 24

Northwest Series Day 5 Marathon, Half Marathon, 10k & 5k

Thu, September 24, 2026

Lewiston, ID

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5K+3

Sep 24

2026 Northwest Series - Day 6 (ID)

Thu, September 24, 2026

Lewiston, ID

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Marathon+3

Sep 24

5K - Individual Age group/open

Thu, September 24, 2026

Lewiston, ID

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5K+2

Sep 26

St. Luke's FitOne 5K/10K/Half Marathon

Sat, September 26, 2026

Boise, ID

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Half Marathon

Oct 3

Legends Never Die Marathon & Half Marathon

Sat, October 3, 2026

Ketchum, ID

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Ultra+1

Oct 4

Moscow Mountain Madness 50k, Half Marathon & 5M

Sun, October 4, 2026

Moscow, ID

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Marathon+6

Oct 10

Hayden Lake Marathon

Sat, October 10, 2026

Hayden Lake, ID

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Marathon+3

Oct 10

City of Trees Marathon

Sat, October 10, 2026

Boise, ID

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Marathon+4

Oct 11

City of Trees Marathon

Sun, October 11, 2026

Boise, ID

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Marathon+3

Oct 17

Idaho Running Day

Sat, October 17, 2026

Boise, ID

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5k+2

Oct 24

Eternal Surrender 5K, 10K and Half Marathon

Sat, October 24, 2026

Coeur D Alene, ID

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Haunted 5k+3

Oct 24

Haunted Half Marathon and 5k by Run the Undergrad

Sat, October 24, 2026

Rexburg, ID

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Half Marathon+2

Oct 24

YMCA Halloween Run presented by Micron

Sat, October 24, 2026

Boise, ID

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Half Marathon+2

Oct 24

Eternal Surrender Half Marathon

Sat, October 24, 2026

Coeur D Alene, ID

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Haunted Half Marathon+7

Oct 25

Halloween Hustle

Sun, October 25, 2026

Coeur d'Alene, ID

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Half Marathon+2

Oct 25

Halloween Hustle Half Marathon, 10k & 5k

Sun, October 25, 2026

Coeur dAlene, ID

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Boise Half Marathon+1

Nov 14

Boise Half Marathon

Sat, November 14, 2026

Boise, ID

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Half Marathon

Apr 17

Race to Robie Creek®

Sat, April 17, 2027

Boise, ID

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Half Marathon+5

Apr 24

Spring Dash

Sat, April 24, 2027

Coeur d'Alene, ID

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Marathon+4

May 2

Boise River Marathon

Sun, May 2, 2027

Boise, ID

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Marathon+3

May 15

YMCA Famous Idaho Potato Marathon & Fun Runs

Sat, May 15, 2027

Boise, ID

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