3 events in San Diego County, California

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

• Dirty December Trail Run [dirtyfeet.us] [Register at ultrasignup.com] - Facebook
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  Sun, Dec 20, 2026

  10k Half Marathon Run Trail Ultra

  San Diego County, California, United States
  OpenStreetMap Google Maps
• Sycamore Canyon [trailrunning.dirtyfeet.us] [Register at ultrasignup.com] - Facebook
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  Sat, Feb 27, 2027

  50k 100k Half Marathon Relay Ultra

  Sycamore Canyon Preserve, San Diego County, California, United States
  OpenStreetMap Google Maps