California · 4K · 12K

Run by the Sea

Run by the Sea is a 4K and 12K event held in Santa Cruz, California. It was last held on October 4, 2026 and is usually run in October; the next date hasn't been announced yet. About 600 runners take part across all distances.

Usually held
October
Location
Santa Cruz, CA
Field size
~600 runners

Race details

Last held
October 4, 2026
Usually held in
October
Distances
4K, 12K
Field size
About 600 runners
Registration
runsignup.com
Official website
runbythesea.org

Registration, course & weather

About the Run by the Sea

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 catc…

Keep exploring

Guides from the RaceRove blog

Run by the Sea: common questions

When is the Run by the Sea?
The next date hasn't been announced in the listing yet. The race is usually held in October. Check the organiser's website for the official date.
Where is the Run by the Sea held?
In Santa Cruz, California.
What distances does the Run by the Sea offer?
4K and 12K.
How many people run the Run by the Sea?
About 600 runners across all of its distances. That figure is an estimate of the field size, not an entry cap.
How do I register for the Run by the Sea?
Registration is handled by the organiser at runsignup.com. Entry fees, caps and deadlines are set there.
Is registration open for the Run by the Sea?
Registration status as last checked September 22, 2026: open. Listed fee for the longest distance, $70 (from runsignup.com, checked September 22, 2026).