Half-Marathon races in Idaho, United States — 2026 running calendar

Spirit of Magic Valley Half Marathon - 10K - 5K - Kids 1 Mile

Twin Falls, Idaho, United States

06 Jun, 2026 (Sat)

$55.00 - $85.00

Running

Half-Marathon 10K 5K

Boise Marathon

Boise, Idaho, United States

20 Jun, 2026 (Sat)

$55.00 - $125.00

Running

Marathon Half-Marathon 10K 5K

Race the Wolf

Sandpoint, Idaho, United States

20 Jun, 2026 (Sat) – 21 Jun, 2026

$45.00 - $120.00

Trail running, Running

8K 1.6K Marathon Half-Marathon

Christmas 5K/10K/Half Marathon in July - Boise

Boise, Idaho, United States

11 Jul, 2026 (Sat)

$35.00 - $55.00

Running

5K 10K Half-Marathon +2

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

Mesa Falls Marathon

Ashton, Idaho, United States

18 Jul, 2026 (Sat)

$15.00 - $85.00

Running

Marathon Half-Marathon 10K 5K +1

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

Eternal Surrender 5K, 10K and Half Marathon

Coeur d'Alene, Idaho, United States

22 Aug, 2026 (Sat)

$25.00

Running

5K 10K Half-Marathon

Malad Valley Marathon

Malad City, Idaho, United States

12 Sep, 2026 (Sat)

$20.00 - $80.00

Running

Marathon Half-Marathon 10K 5K +1

Priest Lake Marathon

Priest Lake, Idaho, United States

19 Sep, 2026 (Sat)

$45.00 - $80.00

Running

Ultra Marathon Half-Marathon 10K

St. Luke's FitOne 5K/10K/Half Marathon

Boise, Idaho, United States

26 Sep, 2026 (Sat)

$25.00

Running

5K 10K Half-Marathon

Hayden Lake Marathon

Hayden Lake, Idaho, United States

10 Oct, 2026 (Sat)

Free - $125.00

Running

Marathon Half-Marathon 10.5K 5K +2