4 events in Santa Cruz County, California

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

• San Lorenzo River Trail Run [runsignup.com]
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  Sat, Jul 11, 2026 at 7:50 AM

  Description

  Run through 300 foot tall, 1500 year-old Coastal Redwoods, lush stream canyons, open meadows, pine and oak forests, and high dry chaparral-covered ridges. The Half Marathon, 30K, Marathon, and 50K events cross the San Lorenzo River (shown above) multiple times!

  (Distances are accurately measured using a Rolatape® surveyor's measuring wheel.)

  2 Miles 6.3 Miles 13.1 Miles 30k 26.2 Miles 50k Run Trail

  Santa Cruz County, California, 95060, United States
  OpenStreetMap Google Maps
• Jolly10K [jolly10k.com] [Register at runsignup.com]
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  Sat, Jul 18, 2026 at 8:00 AM

  Description

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  Join us for another year of fun in the sun! At the Jolly10k you'll take a 10K or a 5K run or walk, through stunning Los Gatos mountain trails and arrive back at the finish line to enjoy fun, food and...

  Join us for another year of fun in the sun! At the Jolly10k you'll take a 10K or a 5K run or walk, through stunning Los Gatos mountain trails and arrive back at the finish line to enjoy fun, food and fellowship. We have informational booths, a variety of resource tables, CPR training and as always the Los Gatos Fire Dept. joins us for a group photo with the Fire Engine. We definitely have fun, but the reason we gather for the Jolly10k is to create a safe environment to have the difficult conversations about addiction and the deadly epidemic of Fentanyl that has flooded our country and stolen far too many young lives. But together, we can remember our loved ones and share life-saving information on how to prevent the next life lost from being someone in your family. Excercise, Information & Education!

  4 Miles 6.2 Miles 10k Run Trail Walk

  Balzer Field Parking Lot, Santa Cruz County, California, 95030, United States
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• Santa Cruz Trail Run [insidetrail.com] [Register at ultrasignup.com] - Facebook - Instagram
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  Sat, Aug 22, 2026

  10k 30k Half Marathon Run Trail

  Henry Cowell Redwoods, S. P., Santa Cruz County, California, 95018, United States
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• Run by the Sea [runbythesea.org] [Register at runsignup.com]
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  Sun, Oct 04, 2026 at 8:00 AM

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  Run by the Sea returns to lovely Wilder Ranch State Park on Sunday, October 4th! This unique Half Marathon, 12K run, and 4K run/walk meanders along the gorgeous coastal bluffs of California's Central...

  Run by the Sea returns to lovely Wilder Ranch State Park on Sunday, October 4th! This unique Half Marathon, 12K run, and 4K run/walk meanders along the gorgeous coastal bluffs of California's Central Coast in Santa Cruz and consists mostly of flat, packed dirt trails. Participants will enjoy scenic coastal views while passing along the bluffs and Wilder Ranch park trails. Get ready to take in the natural beauty of the Monterey Bay, the serene flats of Wilder Ranch's meadows, and maybe even catch a glimpse of some dolphins - no other race is quite like it!

  Now in its 10th year, Run by the Sea is organized by the Santa Cruz Track Club and benefits the track club's youth program, Bike Santa Cruz County, and Santa Cruz Mountain Trail Stewards.

  Race Headquarters and Parking

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  4K Route

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  12K Route

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  Half Marathon Route

  4k 12k Run Trail Walk

  Santa Cruz County, California, 95060, United States
  OpenStreetMap Google Maps