Half Marathons in Montana 2026 | Upcoming Races & Dates

There are 9 half marathons in Montana scheduled for 2026. The next is the Just for the Helena of It in Helena on October 18. Montana half marathons run primarily October through September.

Just for the Helena of It

Sun, Oct 18 · Helena, MT Helena

Kids Mini Mile5KVirtual 5K +4

From $35 Open Closing Soon 50 spots left

Sorry 'Bout That Half Marathon and Team Relay

Sat, Jan 16 · Polson, MT Polson

1/2 Marathon3 Person Team Relay

From $35 Open

Seeley Lake Biathlon

Sat, Feb 6 · Seeley Lake, MT Seeley Lake

3K Biathlon - Adult3 K Biathlon - Youth7.5K Biathlon - Adult +2

From $25 Closed 25 spots left

Governor's Cup

Sat, Jun 12 · Helena, MT Helena

Mile RunMile Run5k +5

From $20 Closed

Whitefish Lake Triathlon (Presented by Whitefish.com)

Sat, Jun 26 · Whitefish, MT Whitefish

Sprint Tri Team RelaySprint TriSprint Tri Team Relay +1

From $79 Open 10 spots left

Montana Women's Triathlon

Sun, Jul 18 · Helena, MT Helena

Youth -19 and UnderMontana Women's TriathlonTeam +5

From $45 Closed 6 spots left

Headwaters Bank Run (26th Annual)

Sat, Jul 24 · Three Forks, MT Three Forks

5k Run/Walk5k Run/Walk10k Run/Walk +3

From $30 Open

Disco PBR

Sat, Sep 11 · Anaconda, MT Anaconda

Disco PBRDisco PBR

From $75 Closed

Bozeman Half Marathon & 10K

Sun, Sep 12 · Bozeman, MT Bozeman

10K10KHalf Marathon +1

From $50 Closed

Half Marathons in Montana — 2026

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