4 events in Orange County, California

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

• Riley Park Trail Races [rileyparktrailraces.com] [Register at ultrasignup.com]
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  Sat, Aug 01, 2026 at 7:00 AM

  5k 10k 30k Half Marathon Trail Ultra

  30952 Oso Pkwy, Orange County, California, 92690, United States
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• The Saddleback Marathon [otrraces.com] [Register at ultrasignup.com] - Facebook - Instagram
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  Sat, Nov 07, 2026

  10k 25k Half Marathon Marathon

  Black Star Canyon Road, Orange County, California, 92676, United States
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