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
Special hours	Sierra Vista	Sierra Vista early closure - July 4, 2025 Sierra Vista Open Space Preserve AND Sierra Road close at 3:00 p.m. on Friday, July 4.
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.
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)
Trail alert	Sierra Vista	Aquila Trail one-way Visitors must travel counterclockwise around Aquila Trail