Marathons in Idaho 2026-2027
15 marathons and 7 half marathons coming up in Idaho, by date. Rated races show how many minutes the course adds or saves against an average road race, from its climbing, surface and typical race-day weather.
Flattest marathons in Idaho
Rated road races, least total climbing first.
- 1.Famous Idaho Potato MarathonBoise, 91m climbing, -3 min vs average, May 2027
- 2.Pocatello MarathonBannock County, 137m climbing, +6 min vs average, Sept 2027
- 3.Teton Dam MarathonRexburg, 139m climbing, +1 min vs average, June 2027
- 4.Coeur d Alene Marathon240m climbing, +2 min vs average, May 2027
- 5.Mesa Falls MarathonAshton, 242m climbing, +7 min vs average, July 2027
- 6.Salmon MarathonSalmon, 246m climbing, +5 min vs average, Sept 2027
- 7.Race to Robie CreekBoise, 651m climbing, +15 min vs average, Apr 2027
Marathons in Idaho (15)
May 2027
Famous Idaho Potato Marathon
-3 minBoise, Idaho
16 May 2027Road91m gainFull
Coeur d Alene Marathon
+2 minIdaho
23 May 2027Road240m gainFull
- 2 May 2027 Boise River Marathon, Boise, Idaho
June 2027
- 5 June 2027 Bear Lake Idaho Marathon, Bear Lake, Idaho
- 20 June 2027 Boise Marathon, Boise, Idaho
July 2027
- 25 July 2027 Idaho Falls Marathon, Idaho Falls, Idaho
Sept 2027
Salmon Marathon
+5 minSalmon, Idaho
5 Sept 2027Road246m gainFull
Pocatello Marathon
+6 minBannock County, Idaho
5 Sept 2027Road137m gainFull
- 19 Sept 2027 Priest Lake Marathon, Priest Lake, Idaho
Oct 2027
- 9 Oct 2027 City of Trees Marathon, Boise, Idaho
- 10 Oct 2027 Hayden Lake Marathon, Hayden, Idaho
- 17 Oct 2027 Idaho Running Day Marathon, Boise, Idaho
Half marathons in Idaho (7)
Nov 2026
- 14 Nov 2026 Boise Half Marathon, Boise, Idaho
May 2027
- 9 May 2027 Long Bridge Half-Marathon, Sandpoint, Idaho
June 2027
- 6 June 2027 Spirit of Magic Valley Half Marathon - 10K - 5K - Kids 1 Mile, Twin Falls, Idaho
Aug 2027
- 8 Aug 2027 Outlaw Trail Ultra Half Marathon, Hansen, Idaho
Sept 2027
- 26 Sept 2027 St. Luke's FitOne 5K/10K/Half Marathon, Boise, Idaho
Marathons in Idaho at a glance
- Busiest month: Oct 2027, with 5 races.
- A typical marathon here climbs about 240m in total (the median of 7 rated courses), against about 145m across the USA.
- Hilliest: Race to Robie Creek, with 651m of climbing (road).
- Coolest race day on average: Hayden Lake Half Marathon (Oct 2027, a typical high of 11°C). Warmest: Mesa Falls Marathon (July 2027, 29°C).
Marathons in other states
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