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Half Marathons in Idaho

  1. Races by State
  2. Idaho
  3. Half Marathon

Browse Half Marathon races in Idaho, including upcoming races and races up to one year past their event date. Sort by highest rating or number of reviews to elevate the most popular races.

For each Half Marathon race, you’ll find key details, finisher ratings and reviews, photos, videos, related articles, race-day weather data and a link to register.

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Showing Half Marathons in Idaho

McCall Trailrunning Classic
McCall, ID | Jun 27, 2026

OVERALL

(0 ratings)

0
Christmas in July 5K, 10K & Half Marathon Boise
Boise, ID | Jul 11, 2026

OVERALL

(0 ratings)

0
Mesa Falls Marathon & Half Marathon
Ashton, ID | Jul 18, 2026

OVERALL

(36 ratings)

4.6
Idaho Falls Marathon, Half Marathon & 5K
Idaho Falls, ID | Jul 25, 2026

OVERALL

(14 ratings)

3.3
IRONMAN 70.3 Boise
Boise, ID | Jul 25, 2026

OVERALL

(0 ratings)

0
Standhope Ultra Challenge
Mackay, ID | Jul 25, 2026

OVERALL

(0 ratings)

0
Outlaw Trail Ultra Half Marathon
Twin Falls, ID | Aug 8, 2026

OVERALL

(1 rating)

4
Harriman 25K & 50K Trail Run
Island Park, ID | Aug 15, 2026

OVERALL

(0 ratings)

0
Pocatello Marathon
Pocatello, ID | Sep 5, 2026

OVERALL

(10 ratings)

4.1
Salmon Marathon & Half Marathon
Salmon, ID | Sep 5, 2026

OVERALL

(1 rating)

4
Payette Lake Run
McCall, ID | Sep 6, 2026

OVERALL

(0 ratings)

0
Malad Valley Marathon
Malad City, ID | Sep 12, 2026

OVERALL

(0 ratings)

0
Priest Lake Marathon
Priest Lake, ID | Sep 19, 2026

OVERALL

(0 ratings)

0
Mainly Marathons Northwest Series Days 5 & 6 (ID)
Lewiston, ID | Sep 23–24, 2026

OVERALL

(1 rating)

5
Bogus 50/50
Boise, ID | Sep 26, 2026

OVERALL

(0 ratings)

0
St. Luke’s FitOne 5K, 10K & Half Marathon
Boise, ID | Sep 26, 2026

OVERALL

(6 ratings)

4.3
Jackass Half Marathon & 5K 🏆
Kellogg, ID | Oct 3, 2026

OVERALL

(139 ratings)

4.9
Legends Never Die
Ketchum, ID | Oct 3, 2026

OVERALL

(0 ratings)

0
Moscow Mountain Madness
Moscow, ID | Oct 4, 2026

OVERALL

(0 ratings)

0
City of Trees Marathon
Boise, ID | Oct 10, 2026

OVERALL

(2 ratings)

2.5

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