Half Marathons in Idaho 2026 | Upcoming Races & Dates

There are 6 half marathons in Idaho scheduled for 2026. The next is the Race to Robie Creek® in Boise on April 18. Idaho half marathons run primarily April through November.

Race to Robie Creek®

Sat, Apr 18 · Boise, ID Boise

Half Marathon

From $75 Open Closing Soon

Post Falls Triathlon/Duathlon

Sun, Aug 2 · Post Falls, ID Post Falls

Individual Sprint TriathlonTeam Sprint TriathlonTeam Duathlon +1

From $85 Open

Outlaw Trail Ultra Half Marathon

Sat, Aug 8 · Hansen, ID Hansen

Outlaw Trail Ultra Half Marathon

From $85 Open

Bear Lake Brawl Triathlon

Sat, Sep 19 · St Charles, ID St Charles

Half Aquathlon (Swim 1.2 Miles, Run 13.1 Miles)Sprint - Short DistanceSprint Relay 2 to 3 People One Race +7

From $35 Open

Top of Tamarack

Sat, Sep 26 · Tamarack, ID Tamarack

BikeRun/Hike

From $70 Open 100 spots left

Boise Half Marathon

Sat, Nov 14 · Boise, ID Boise

Boise Half Marathon

From $55 Open

Half Marathons in Idaho — 2026

Race to Robie Creek®

Post Falls Triathlon/Duathlon

Outlaw Trail Ultra Half Marathon

Bear Lake Brawl Triathlon

Top of Tamarack

Boise Half Marathon

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