10K races in Montana, United States — 2026 running calendar

Annual Fun Run for Charities

Red Lodge, Montana, United States

05 Sep, 2026 (Sat)

Free

Running

10K 5K 3.2K

AIDSPIRIT USA Marathon

Harlowton, Montana, United States

06 Sep, 2026 (Sun)

$35.00 - $120.00

Running

Marathon Half-Marathon 10K 5K

The Rut Mountain Runs

Big Sky, Montana, United States

11 Sep, 2026 (Fri) – 13 Sep, 2026

Free

Trail running, Running

Ultra Half-Marathon 4K 28.6K +4

Healthy Tribes: Run on the Rims

Billings, Montana, United States

12 Sep, 2026 (Sat)

Running

10K 5K 3.2K

Pack the Place in Pink Presents Lewistown Chokecherry Run

Lewistown, Montana, United States

12 Sep, 2026 (Sat)

Free - $30.00

Walking, Running

5K 10K 1.6K +1

Run For Her 5K/10K

Billings, Montana, United States

12 Sep, 2026 (Sat)

$35.00

Running

5.1K 10.3K

Bozeman Half Marathon & 10K

Bozeman, Montana, United States

13 Sep, 2026 (Sun)

$65.00 - $118.00

Running

Half-Marathon 10K

Montana Marathon

Billings, Montana, United States

20 Sep, 2026 (Sun)

$45.00 - $115.00

Running

Marathon Half-Marathon 10K 5K

Whitefish Trail Blazer

Whitefish, Montana, United States

03 Oct, 2026 (Sat) – 04 Oct, 2026

$10.00 - $125.00

Running

Ultra 49.9K Half-Marathon 10.5K +6

Back Roads Half & 10k

Red Lodge, Montana, United States

04 Oct, 2026 (Sun)

$30.00 - $40.00

Running

Half-Marathon 10K

Just for the Helena of It

Helena, Montana, United States

18 Oct, 2026 (Sun)

$35.00 - $95.00

Running

Half-Marathon 10K 5K 1.6K +3

Burn The Bird 10k, 5k and 1.33 mile Fun Run/Walk

Great Falls, Montana, United States

26 Nov, 2026 (Thu)

$15.00 - $45.00

Running

10K 5K 2.1K