Half Marathons in Idaho 2026 | Upcoming Races & Dates

There are 9 half marathons in Idaho scheduled for 2026. The next is the Eternal Surrender Half Marathon in Coeur D Alene on October 24. Idaho half marathons run primarily October through August.

Rush Creek Stampede

Sat, Oct 10 · Cambridge, ID Cambridge

5K Run10K Run1/2 Marathon

From $40 Open

Eternal Surrender Half Marathon

Sat, Oct 24 · Coeur D Alene, ID Coeur D Alene

5k10kHalf Marathon +2

From $35 Closed

YMCA Halloween Run presented by Micron

Sat, Oct 24 · Boise, ID Boise

Monster MileFreaky 5KHalf Marathon

From $30 Open Closing Soon

Haunted Half Marathon and 5k by Run the Undergrad

Sat, Oct 24 · Rexburg, ID Rexburg

Haunted 5k BYU-I Student EntryHaunted 5kHaunted Half Marathon BYU-I Student Entry +1

From $10 Open

Halloween Hustle

Sun, Oct 25 · Coeur d'Alene, ID Coeur d'Alene

Goblin Kids Fun RunTeam Hoyt 5KFreaky 5K +4

From $20 Open

ZD30 The Summit (1 Mile, 5K, and 10K, 1/2 Marathon, 30 Mile Ultra)

Sat, Nov 7 · Boise, ID Boise

1 Mile Run/Walk5k Run/Walk10k Run/Walk +2

From $20 Open Closing Soon

Boise Half Marathon

Sat, Nov 14 · Boise, ID Boise

Boise Half MarathonVirtual

From $45 Open

Race to Robie Creek®

Sat, Apr 17 · Boise, ID Boise

Half MarathonHalf Marathon

From $75 Closed

Spring Dash

Sat, Apr 24 · Coeur d'Alene, ID Coeur d'Alene

5K5K10K +7

From $0 Open

Popsicle 5K/10K/Half - Boise

Sun, Aug 22 · Boise, ID Boise

5K-No Shirt5K5K +15

From $35 Closed

Half Marathons in Idaho — 2026

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