Idaho Ultramarathons
16 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 16 upcoming ultras over the next 12 months. October is the busiest month for them, with 6. Most are around McCall, Ketchum, Eagle. The next one is If You're Not First You're Last on September 11 in Eagle.
- Sep 20265 races
- Oct 20266 races
- Nov 20261 race
- Jan 20272 races
- Apr 20271 race
- Jul 20271 race
September 2026
- Fri 9/11If You're Not First You're LastEagle, ID · Timed · register ↗
- Sat 9/19Bear Lake Brawl TriathlonSt Charles, ID · 25.6K · 51.2K · 70.3 Miles · 69.1 Miles · 14.3 Miles · from $35 · register ↗
- Sat 9/19IMTUF 100 - Idaho Mountain Trail Ultra FestivalMcCall, ID · 100 Mile · Trail · register ↗
- Sat 9/19Priest Lake MarathonPriest Lake, ID · 50K · Marathon · Half Marathon · 10K · from $30 · register ↗
- Sat 9/26Bogus 50/50Boise, ID · 50 Mile · 50K · 27K · register ↗
October 2026
- Sat 10/3Idaho High Mountain TriathlonYellow Pine, ID · 35 Miles · 37 Miles · Trail · from $100 · register ↗
- Sat 10/3Legends Never DieKetchum, ID · 55K · register ↗
- Sun 10/4Moscow Mountain MadnessMoscow, ID · 50K · Half Marathon · 5 Miles · Trail · register ↗
- Sat 10/10Sasquatch ShuffleMcCall, ID · 50K · 30K · 20K · register ↗
- Sat 10/31Endless Trails Series RegistrationsMcCall, ID · Ultra · Trail · register ↗
- Sat 10/31Fall Creek BeastSwan Valley, ID · 50K · Half Marathon · register ↗
November 2026
- Fri 11/20Toughest Alive GRIT Night — IdahoMeridian, ID · Ultra · 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 ↗
July 2027
- Sat 7/24Standhope Ultra ChallengeKetchum, ID · 100 Mile · 60K · 30K · 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
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