1 ultra event in Jefferson County, Idaho

From big races to Saturday morning group runs—find ultra events and connect with the local endurance sports community.

• Spitfire Ultra Trail Challenge [spitfireultra.com] [Register at ultrasignup.com] - Facebook - Instagram
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  Sat, Apr 18, 2026

  5k 12k 30k 55k Trail Ultra

  1098 N 3600 E, Jefferson County, Idaho, United States
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