Half Marathons in Idaho
From first-timer-friendly flats to trails worth traveling for, find a Idaho half marathon that fits your goals and your sense of adventure.
31
upcoming races
31 races
Race to Robie Creek® · Boise, Idaho
Falls2Falls 2026 · Twin Falls, Idaho
Spring Dash · Coeur d'Alene, Idaho
Boise River Marathon · Eagle, Idaho
Long Bridge Half-Marathon · Sandpoint, Idaho
YMCA Famous Idaho Potato Marathon & Fun Runs · Boise, Idaho
CDA Marathon · Coeur d'Alene, Idaho
Redfish Lake Lodge Memorial Weekend Run · Stanley, Idaho
Running for Children's Rights to Both Parents - 6 of 50 Half Marathons in 50 States - · Ashton, Idaho
Post Falls Half 13.1, 10k 5k · Post Falls, Idaho
Spirit of Magic Valley Half Marathon - 10K - 5K - Kids 1 Mile · Twin Falls, Idaho
Scenic River Classic · Idaho Falls, Idaho
Race the Wolf · Sandpoint, Idaho
Boise Marathon · Boise, Idaho
Christmas 5K/10K/Half Marathon in July - Boise · Boise, Idaho
Mesa Falls Marathon · Ashton, Idaho
Outlaw Trail Ultra Half Marathon · Hansen, Idaho
Priest Lake Marathon · Priest Lake, Idaho
2026 Northwest Series - Day 5 (ID) · Lewiston, Idaho
2026 Northwest Series - Day 6 (ID) · Lewiston, Idaho
FitOne Half Marathon · Boise, Idaho
St. Luke's FitOne 5K/10K/Half Marathon · Boise, Idaho
Legends Never Die · Ketchum, Idaho
Moscow Mountain Madness · Moscow, Idaho
Hayden Lake Marathon · Hayden Lake, Idaho
City of Trees Marathon · Boise, Idaho
Idaho Running Day · Boise, Idaho
Haunted Half Marathon and 5k by Run the Undergrad · Rexburg, Idaho
Halloween Hustle · Coeur d'Alene, Idaho
ZD30 The Summit (1 Mile, 5K, and 10K, 1/2 Marathon, 30 Mile Ultra) · Boise, Idaho
Boise Half Marathon · Boise, Idaho