5 events in Jefferson County, Oregon

From big races to Saturday morning group runs—find running, cycling, triathlon, and swimming events and connect with the local endurance sports community.

• Smith Rock Classic [alpinerunning.co] [Register at ultrasignup.com]
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  Sat, May 30, 2026

  10 Miles 50k 50 Miles Ultra

  Skull Hollow, Jefferson County, Oregon, United States
  OpenStreetMap Google Maps
• The Hoodoo Challenge: Run To The Top [sisterskiwanis.org] [Register at ultrasignup.com]
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  Sat, Jul 25, 2026

  5k Half Marathon Run

  Jefferson County, Oregon, United States
  OpenStreetMap Google Maps
• Mountain Lakes 100 [gobeyondracing.com]
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  Sat, Sep 19, 2026

  100 Miles Run

  Olallie Lake Resort Road, Jefferson County, Oregon, United States
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• Mountain Lakes 100 [gobeyondracing.com] [Register at ultrasignup.com] - Facebook - Instagram
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  Sat, Sep 19, 2026 at 8:00 AM

  Ultra

  Olallie Lake Resort, Jefferson County, Oregon, United States
  OpenStreetMap Google Maps
• Suttle Lake Trailfest [alpinerunning.co] [Register at ultrasignup.com] - Facebook - Instagram
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  Sat, Oct 24, 2026 at 8:00 AM

  Trail Ultra

  Jefferson County, Oregon, United States
  OpenStreetMap Google Maps