5K races in Idaho, United States — 2026 running calendar

Christmas 5K/10K/Half Marathon in July - Idaho Falls

Idaho Falls, Idaho, United States

12 Jul, 2026 (Sun)

$40.00 - $60.00

Running

5K 10K Half-Marathon +2

Running for Children's Rights to Both Parents - 7 of 50 Half Marathons in 50 States - Idaho

Ashton, Idaho, United States

18 Jul, 2026 (Sat)

$50.00 - $1,000.00

Running

Half-Marathon 5K

26th Atomic Days Blast Off Fun Run

Arco, Idaho, United States

18 Jul, 2026 (Sat)

$20.00

Running, Walking

10K 5K 1.6K

Mesa Falls Marathon

Ashton, Idaho, United States

18 Jul, 2026 (Sat)

$15.00 - $85.00

Running

Marathon Half-Marathon 10K 5K +1

Baby Foot 5K

Sandpoint, Idaho, United States

25 Jul, 2026 (Sat)

$35.00

Running

5K

Founders Day Fun Run

Lava Hot Springs, Idaho, United States

25 Jul, 2026 (Sat)

$15.00

Running

5K 1.6K

Farm Life 5k Trail Run

Idaho Falls, Idaho, United States

01 Aug, 2026 (Sat)

Free - $10.00

Running, Obstacle race

5K FREE Grit League Obstacle Course

Splash n Dash 5k Fun Run/Walk (3rd Annual)

Burley, Idaho, United States

01 Aug, 2026 (Sat)

$25.00

Running

5K

Kuna Days 5K Run and Walk

Kuna, Idaho, United States

01 Aug, 2026 (Sat)

$25.00

Running

5K

Lyndsey Kunz Memorial Run

Victor, Idaho, United States

08 Aug, 2026 (Sat)

$25.00 - $55.00

Running

10K 5K

Caribou County Fair 5k

Grace, Idaho, United States

08 Aug, 2026 (Sat)

$20.00

Running

5K

Wallace Huckleberry Festival and 5k Fun Run

Wallace, Idaho, United States

14 Aug, 2026 (Fri) – 16 Aug, 2026

$55.00

Running

5K