17 events in Santa Clara County, California

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

• Sierra Azul Trail Challenge [tctruns.com] [Register at ultrasignup.com] - Facebook - Instagram
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  Sat, Apr 18, 2026 at 8:00 AM

  5k 7 Miles 20 Miles 50k Half Marathon Trail Ultra

  21785 Almaden Rd, Santa Clara County, California, United States
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• Hacienda Hills Trail Run - Spring [tctruns.com] [Register at ultrasignup.com] - Facebook - Instagram
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  Sat, May 02, 2026

  5k 10k 9 Miles 30k 50k Half Marathon Kids Run Trail Ultra

  21785 Almaden Rd, Santa Clara County, California, United States
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• Quicksilver Endurance Runs [quicksilver-running.com] [Register at ultrasignup.com] - Facebook
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  Sat, May 09, 2026

  50k 100k Run Ultra

  21785 Almaden Road, Santa Clara County, California, United States
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• 13 Mile Trail Race Top Down [tctruns.com] [Register at ultrasignup.com] - Facebook - Instagram
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  Sat, May 16, 2026 at 9:00 AM

  13 Miles Half Marathon Trail

  21785 Almaden Rd, Santa Clara County, California, United States
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• Calero Trail Run - Spring [tctruns.com] [Register at ultrasignup.com] - Facebook - Instagram
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  Sat, May 30, 2026

  5k 10k 15k 25k 50k Half Marathon Kids Run Trail Ultra

  23205 McKean Rd, Santa Clara County, California, 95141, United States
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• Mount Madonna Challenge [mtmadonnachallenge.com] [Register at ultrasignup.com] - Instagram
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  Sat, Aug 08, 2026

  5k 10k Half Marathon

  Sprig Lake Day Use Area, Santa Clara County, California, United States
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• Almaden Hills Trail Run - Summer [tctruns.com] [Register at ultrasignup.com] - Facebook - Instagram
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  Sat, Aug 15, 2026 at 8:00 AM

  5k 10k 8 Miles 30k 50k Half Marathon Run Trail Ultra

  19535 Mockingbird Hill Lane, Santa Clara County, California, 95120, United States
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Local Clubs & Organizations