Half Marathons in Montana — 2026

There are 13 half marathons in Montana scheduled for 2026. The next is the Headwaters Bank Run in Three Forks on July 25. Montana half marathons run primarily July through February.

Race Montana Triathlon and Duathlon 2026

Sat, Aug 22 · Great Falls, MT Great Falls
YOUTH Triathlon Short Course (50 METER SWIM / 1 MILE BIKE / 0.5 MILE RUN)ADULT AND YOUTH Team Triathlon Long Course (100 METER SWIM / 3 MILE BIKE / 1 MILE RUN)ADULT AND YOUTH Triathlon Long Course (100 METER SWIM / 3 MILE BIKE / 1 MILE RUN) +4
From $35 Open
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Seeley Lake Biathlon

Sat, Feb 6 · Seeley Lake, MT Seeley Lake
3 K Biathlon - Youth3K Biathlon - Adult7.5K Biathlon - Youth +2
From $25 Closed 25 spots left
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Seeley Lake 2 Anaconda 2 Great Falls 1 Greenough 1 Helena 1 Lakeside 1 Missoula 1 Polson 1 Red Lodge 1 Three Forks 1 Bozeman 1

All Montana Races

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