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	Máyyan 'Ooyákma – Coyote Ridge	Reservations Required Sat/Sun During Butterfly Season Saturdays & Sundays (March through May): Reservations required. Access to trails inside the Habitat Protection Area are only available by signing up for a FREE docent-led activity. View and sign up for guided activities here.
Trail closed	Sierra Vista	Boccardo Trail partial closure 4/15/25: East side of the Boccardo Loop Trail (Todd Quick junction to Sierra Trail) closed for resource management. Access to Alum Rock Park remains open.
Parking lot closure	Coyote Valley	Equestrian lot closed 4/26 Coyote Valley equestrian lot closed 4/26/25, 8am-1pm, for special event
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 closed to bikes/horses	Máyyan 'Ooyákma – Coyote Ridge	No Bikes/Horses on Trails Sat/Sun March through May Trails closed to horses and bikes Saturdays and Sundays (March through May).