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Marathons in Idaho, United States

28 upcoming marathons listed in Idaho across 2 cities. Next: Owyhee County 50/50 Night Run on July 31, 2026.

28marathons upcoming
2cities
July 31, 2026Next race
Marathon, Half marathon, Ultra, 10K, 5K, VirtualDistances
Idaho, United States
31JUL
ULTRA
Owyhee County 50/50 Night Run
Idaho, United States
July 31, 2026 JUL
Hansen, Idaho, United States
08AUG
ULTRA
Outlaw Trail Ultra Half Marathon
Hansen, Idaho, United States
August 8, 2026 AUG
Island Park, Idaho, United States
15AUG
ULTRA
Harriman Trail Runs
Island Park, Idaho, United States
August 15, 2026 AUG
Coeur D Alene, Idaho, United States
22AUG
21.1K
Eternal Surrender 5K, 10K and Half Marathon
Coeur D Alene, Idaho, United States
August 22, 2026 AUG
Idaho, United States
05SEP
42.2K
Idaho Triple Crown- Marathon
Idaho, United States
September 5, 2026 SEP
Pocatello, Idaho, United States
05SEP
42.2K
Pocatello Marathon
Pocatello, Idaho, United States
September 5, 2026 SEP
Salmon, Idaho, United States
05SEP
42.2K
Salmon Marathon
Salmon, Idaho, United States
September 5, 2026 SEP
Malad City, Idaho, United States
12SEP
42.2K
Malad Valley Marathon
Malad City, Idaho, United States
September 12, 2026 SEP
Priest Lake, Idaho, United States
19SEP
ULTRA
Priest Lake Marathon
Priest Lake, Idaho, United States
September 19, 2026 SEP
Lewiston, Idaho, United States
23SEP
ULTRA
Northwest Series - Day 5 - ID
Lewiston, Idaho, United States
September 23, 2026 SEP
Lewiston, Idaho, United States
24SEP
42.2K
Northwest Series - Day 6 - ID
Lewiston, Idaho, United States
September 24, 2026 SEP
Boise, Idaho, United States
26SEP
ULTRA
Bogus 50/50
Boise, Idaho, United States
September 26, 2026 SEP
Boise, Idaho, United States
26SEP
21.1K
St. Luke's FitOne 5K/10K/Half Marathon
Boise, Idaho, United States
September 26, 2026 SEP
Kellogg, Idaho, United States
03OCT
21.1K
Jackass Half Marathon & 5K
Kellogg, Idaho, United States
October 3, 2026 OCT
Boise, Idaho, United States
10OCT
42.2K
City of Trees Marathon
Boise, Idaho, United States
October 10, 2026 OCT
Hayden Lake, Idaho, United States
10OCT
ULTRA
Hayden Lake Marathon
Hayden Lake, Idaho, United States
October 10, 2026 OCT
Cambridge, Idaho, United States
10OCT
42.2K
Rush Creek Stampede
Cambridge, Idaho, United States
October 10, 2026 OCT
Boise, Idaho, United States
17OCT
42.2K
Idaho Running Day
Boise, Idaho, United States
October 17, 2026 OCT
Rexburg, Idaho, United States
24OCT
21.1K
Haunted Half Marathon and 5k by Run the Undergrad
Rexburg, Idaho, United States
October 24, 2026 OCT
Boise, Idaho, United States
25OCT
42.2K
Boise Marathon Idaho
Boise, Idaho, United States
October 25, 2026 BQ Qualifier
Coeur d'Alene, Idaho, United States
25OCT
21.1K
Halloween Hustle
Coeur d'Alene, Idaho, United States
October 25, 2026 OCT
Sun Valley, Idaho, United States
07NOV
42.2K
REVEL Sun Valley
Sun Valley, Idaho, United States
November 7, 2026 BQ Qualifier
Boise, Idaho, United States
07NOV
ULTRA
ZD30 The Summit (1 Mile, 5K, and 10K, 1/2 Marathon, 30 Mile Ultra)
Boise, Idaho, United States
November 7, 2026 NOV
Boise, Idaho, United States
14NOV
21.1K
Boise Half Marathon
Boise, Idaho, United States
November 14, 2026 NOV

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Cities

Place Marathons
Boise 1
Sun Valley 1

Planning notes for Idaho, United States

Use this region page to shortlist 28 upcoming races by date, distance, registration path, and official source.

  • Next raceOwyhee County 50/50 Night Run on July 31, 2026
  • Busy monthsSeptember (9), October (8), August (3)
  • DistancesMarathon, Half marathon, Ultra, 10K, 5K, Virtual
  • VerifyOpen each race page, then confirm details from its official, registration, course-map, or source link.

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