Idaho Ultramarathons
11 upcoming ultras across Idaho, updated nightly. Want radius search and maps? Open these in the Race Finder.
When to race: ultras in Idaho
Idaho has 11 upcoming ultras over the next 12 months. Among complete calendar months, January 2027 has the most listed races, with 2. Most are around McCall, Swan Valley, Idaho Falls. The next one is Endless Trails Series Registrations on October 31 in McCall.
- Oct 20262 races
- Jan 20272 races
- Apr 20271 race
- Jun 20271 race
- Jul 20271 race
- Aug 20272 races
- Sep 20272 races
October 2026
- Sat 10/31Endless Trails Series RegistrationsMcCall, ID · Ultra · Trail · register ↗
- Sat 10/31Fall Creek BeastSwan Valley, ID · 50K · Half Marathon · register ↗
January 2027
- Fri 1/8Dizzy Horse, A Winter Backyard UltraIdaho Falls, ID · Timed · from $55 · register ↗
- Sat 1/23Wilson Creek Frozen 50kMelba, ID · 50K · 20 Miles · 10 Mile · from $60 · register ↗
April 2027
- Sat 4/17Spitfire Ultra Trail ChallengeMenan, ID · 55K · 30K · 12K · 5K · Trail · register ↗
June 2027
- Sat 6/19River of No Return Endurance RunsChallis, ID · 108K · 55K · 32K · register ↗
July 2027
- Sat 7/24Standhope Ultra ChallengeKetchum, ID · 100 Mile · 60K · 30K · register ↗
August 2027
- Fri 8/13Inkom Last Man Standing 1.1Inkom, ID · Timed · register ↗
- Sat 8/14Harriman Ultra Trail RunsIsland Park, ID · 50K · 25K · 10K · 1K · Trail · register ↗
September 2027
- Fri 9/10CDA Ultra 73.2 (Trail of the Coeur D’Alenes)Coeur D Alene, ID · 73.2 Miles · Trail · from $295 · register ↗
- Sat 9/18Priest Lake MarathonPriest Lake, ID · 50K · Marathon · Half Marathon · 10K · from $30 · register ↗
Planning a race
- The adventure listrim to rim, the big rounds, and routes worth planning a year around
- Getting inhow entry works for the races that sell out or ballot
More Idaho: Marathons · Half Marathons · 5K Races · 10K Races · All Idaho races · Browse by state