Half Marathons in Idaho 2026 | Upcoming Races & Dates | My Next Race

There are 10 half marathons in Idaho scheduled for 2026. The next is the Rush Creek Stampede in Cambridge on October 10. 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 Closing Soon

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