Half Marathons in Idaho
Every upcoming Half Marathon race we know about in Idaho. Where a detail isn't confirmed, we mark it unknown rather than guessing.
Race results
Where
When
Showing 17+ of 17 races · loading the full list…
Sep 12, 2026 · 8:00 AM · Malad City, ID
Malad Valley Marathon
1M5K10KHalf MarathonMarathon
- Price
- $20-$80
Sep 19, 2026 · 7:00 AM · Priest Lake, ID
Priest Lake Marathon
10KHalf MarathonMarathonUltra
- Price
- $48.50-$85.30
5K10KHalf Marathon
- Price
- $38.10-$59.30
- Field size
- 14,000 · based on the organizer's entry cap
Oct 10, 2026 · 7:30 AM · Hayden Lake, ID
Hayden Lake Marathon
5KHalf MarathonMarathon
- Price
- Free-$144.10
- Field size
- 25 · based on the organizer's entry cap
Oct 11, 2026 · 8:00 AM · Boise, ID
City of Trees Marathon
5K10KHalf MarathonMarathon
- Price
- $59.69-$112.59
Oct 24, 2026 · 10:00 AM · Rexburg, ID
Haunted Half Marathon and 5k by Run the Undergrad
5KHalf Marathon
- Price
- $11.60-$64.60
Oct 24, 2026 · 9:00 AM · Boise, ID
YMCA Halloween Run presented by Micron
1M5KHalf Marathon
- Price
- $33.63-$65.65
Oct 25, 2026 · 8:00 AM · Coeur d'Alene, ID
Halloween Hustle
5K10KHalf Marathon
- Price
- Free-$107
- Field size
- 25 · based on the organizer's entry cap
Nov 14, 2026 · 9:00 AM · Boise, ID
Boise Half Marathon
Half Marathon
- Price
- $70.27
- Field size
- 600 · based on the organizer's entry cap
May 2, 2027 · 6:30 AM · Boise, ID
Boise River Marathon
5K10KHalf MarathonMarathonflat and fast
- Price
- $38.53-$64.98
May 15, 2027 · 7:00 AM · Boise, ID
YMCA Famous Idaho Potato Marathon & Fun Runs
5K10KHalf MarathonMarathonflat and fast
- Price
- $38.96-$97.68
May 29, 2027 · 7:00 AM · Coeur d'Alene, ID
CDA Marathon
1M5K10KHalf MarathonMarathonCertified course · per organizer
- Price
- Free-$107
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