Run by The Sea

Santa Cruz, United States • 4 Oct 2026

Run by the Sea

Run by the Sea is a set of road and trail races held at Wilder Ranch State Park in Santa Cruz on October 4, 2026. The event includes a Half Marathon, a 12K race, and a 4K run/walk. Now in its tenth year, the event is organized by the Santa Cruz Track Club and benefits the club’s youth program, Bike Santa Cruz County, and Santa Cruz Mountain Trail Stewards.

The courses mostly follow packed dirt trails and coastal bluff paths along the Monterey Bay. Much of the terrain is flat and passes through the park meadows and bluff-top viewpoints, offering open coastal views. Participants may also see marine life from the route.

Distances included

  • Half Marathon
  • 12K
  • 4K run/walk

Race details note the use of Wilder Ranch park trails and bluff-top sections. The description above uses only information provided by the organizer and does not include start times or registration specifics. Visit the organization's website for the most recent information.

Race information

Half Marathon
Run by the Sea Half Marathon
12 km
Run by the Sea 12k
Run by the Sea 4k
Visit the organization's website for the most recent information.
Trail runs nearby

A free in-person trail run hosted by Fleet Feet Aptos and Altra near Nisene Marks, with demo shoes available and beer at Other Brother Beer Aptos. The event features a group trail run and is scheduled to last two hours.

Multiple trail distances from 5K to 50K on very hilly single track and dirt roads at Rancho Cañada del Oro. The course features scenic foothill views, two aid stations, enforced cutoffs, and finishers receive a medal.

Experience a scenic trail run through ancient Coastal Redwoods and lush river canyons in Santa Cruz. Choose from multiple distances including a 50K and marathon with several river crossings.

Trail running at Calero County Park with multiple distances across single track and dirt paths, significant climbs, aid stations and free parking at the park.

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