A muddy trail winding through green hills is blocked by a small mudslide cutting across it

Alerts and Closures

Know Before You Go

Before visiting the preserves, please check this page for notices, closures and safety advisories.

To report an incident or issue such as obstructions on the trail at an Open Space Authority preserve, please Contact Us and select “Trail/preserve questions.”

To report a fire, medical emergency or suspicious activity at an Open Space Authority preserve, please call 911 immediately.

Alert Level	Preserves	Description
Trail closed	Sierra Vista	Trail Closures The Eastern portion of Sierra Vista Open Space Preserve is closed through Sunday, June 21.
Parking lot closure	Coyote Valley	Equestrian lot closed for construction Beginning June 22, 2026, the equestrian lot will be closed due to construction for a public access improvement project. Equestrians are still welcome to ride into the preserve during this time; however, we are unable to accommodate haul-ins during construction. Learn more about the project here.
Preserve alert	Coyote Valley	Public Access Improvement Project Construction Beginning June 22, 2026, construction for a new accessibility and public‑access improvement project will begin at Coyote Valley Open Space Preserve. We hope to minimize closures as much as possible during construction. Please check for posted notices here and at the preserve. Learn more about the project here.
Trail alert	Coyote Valley	Arrowhead Trail one-way for bikes Bikes must travel one-way around the Arrowhead Loop Trail. Direction rotates monthly. Click here to view the schedule (PDF)
Preserve closed	Máyyan 'Ooyákma – Coyote Ridge	Habitat Protection Area Closed Mondays and Tuesdays Habitat Protection Area (Serpentine Spring, Tule Elk, and Bay Checkerspot trails) CLOSED Mondays and Tuesdays for scientific research.
Trail alert	Máyyan 'Ooyákma – Coyote Ridge	Butterfly Pass required in Habitat Protection Area FREE Butterfly Pass required in Habitat Protection Area. Get yours here.