Idaho · Marathon
Marathons in Idaho
Idaho currently has 14 upcoming marathons with a confirmed date listed in RaceRove. Boise, Ashton, Coeur d'Alene and Idaho Falls have the largest concentration of events.
May (4), June (4) and September (4) are the busiest months on the calendar right now. Another 2 annual marathons are waiting for next year's date to be announced.
- Upcoming, date confirmed
- 14
- Active listings
- 16
- Cities with races
- 13
More ways to browse Idaho
Upcoming marathons in Idaho
All 14 with a confirmed date, soonest first.
Dates come from each race's own listing. Always confirm on the organiser's site before you book travel.
Largest marathon events in Idaho
By estimated field size across all distances at the event.
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City of Trees MarathonBoise, ID Usually held in October · next date not announcedMarathonHalf Marathon10K5K ~1,000 runners
When marathons happen in Idaho
- May
- 4 upcoming races
- June
- 4 upcoming races
- July
- 2 upcoming races
- September
- 4 upcoming races
Idaho cities with the most marathons
- Boise
- 3 upcoming races
- Ashton
- 1 upcoming race
- Coeur d'Alene
- 1 upcoming race
- Idaho Falls
- 1 upcoming race
- Malad City
- 1 upcoming race
- McCall
- 1 upcoming race
- Pocatello
- 1 upcoming race
- Priest Lake
- 1 upcoming race
Annual events awaiting their next date
These marathons are held every year, but the next date isn't in the listing yet. The month shown is when each is usually held.
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City of Trees MarathonBoise, ID Usually held in October · next date not announcedMarathonHalf Marathon10K5K ~1,000 runners
-
Hayden Lake MarathonHayden Lake, ID Usually held in October · next date not announcedMarathon10K5K6.55 Miles +1 more ~84 runners
Marathons in nearby states
Guides from the RaceRove blog
- 8 min read How to Choose Your First Marathon A practical checklist for choosing a first marathon based on course, weather, cutoff, travel, field size and support.
- 7 min read How to Find a 5K, 10K, Half Marathon or Marathon Near You A practical way to find running races near you: pick a distance, decide how far you'll travel, read the listing properly and confirm the details before you register.
- 4 min read Diplo's Run Club 2026-27: Every City, Date and Course Diplo's Run Club is a 5K with a post-race concert. Every US date for 2026-27 (San Francisco, New York, Los Angeles, San Diego and Phoenix), start times and courses.
- Blog All guides Planning advice for finding, choosing and travelling to races.
Marathons in Idaho: common questions
- How many marathons are there in Idaho?
- RaceRove currently lists 14 upcoming marathons in Idaho with a confirmed date, plus 2 annual events whose next date hasn't been announced yet.
- How long is a marathon?
- A marathon is 26.2 miles (42.2 kilometres).
- Which Idaho cities have the most marathons?
- By upcoming events listed in RaceRove: Boise (3), Ashton (1), Coeur d'Alene (1), Idaho Falls (1) and Malad City (1).
- When is marathon season in Idaho?
- Of the upcoming marathons listed, the busiest months are May (4), June (4) and September (4).
- What is the biggest marathon in Idaho?
- By estimated field size, the largest event with a marathon listed in Idaho is the YMCA Famous Idaho Potato Marathon & Fun Runs, with about 3,000 runners across all of its distances.
Search every marathon in Idaho
Filter by month, course profile and field size, save races to a shortlist and compare them side by side in the interactive search.