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

There are 11 half marathons in Idaho scheduled for 2026. The next is the St. Luke's FitOne 5K/10K/Half Marathon in Boise on September 26. Idaho half marathons run primarily September through April.

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

Sat, Sep 26 · Boise, ID Boise

5K10K13.1 Half Marathon

From $25 Open

Top of Tamarack

Sat, Sep 26 · Tamarack, ID Tamarack

BikeRun/Hike

From $70 Open 100 spots left

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 Open

YMCA Halloween Run presented by Micron

Sat, Oct 24 · Boise, ID Boise

Monster MileFreaky 5KHalf Marathon

From $30 Open

Haunted Half Marathon and 5k by Run the Undergrad

Sat, Oct 24 · Rexburg, ID Rexburg

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

From $10 Open

Halloween Hustle

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

Goblin Kids Fun RunFreaky 5KTeam Hoyt 5K +4

From $0 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 Closing Soon