Events
Run by the Sea 4k
200 spots left. Registration Opens February 20, 2026 at 10:12am PST
Run by the Sea 12k
200 spots left. Registration Opens February 20, 2026 at 10:12am PST
Run by the Sea Half Marathon
200 spots left. Registration Opens February 20, 2026 at 8:59am PST
Race Website
Additional race information can be found at http://runbythesea.org/.
Place
Santa Cruz, CA US 95060
Description
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 101h 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

4K Route


Race Contact Info
If you have any questions about this race, click the button below.
Half Marathon Course
Half Marathon Course
