In September and October trails in the southern area of Wunderlich Park will be closed for annual vegetation management within the utility right-of-way.

Some trails remain closed due to damage from winter storms. Toyon Campground are closed and without water. Werder Playground is closed for construction.

September 25–29, San Bruno Mountain Park will be closed to all cars while the main park gates are replaced. Visitors may still enter on foot through the Crocker Gate.

Pump track construction continues in Flood Park requiring the park to remain closed, Monday to Friday, through Wednesday, October 11 to ensure safe entrance and exit by semi-trailer trucks.

Huckleberry Flat, a camping area for dogs and their owners at Memorial Park, may now be reserved by phone. Visitors are required to bring a dog when staying in this area.

Yellowjackets or wasps are stinging insects commonly found during the warmer months of the year, especially in picnic areas and nearby.  Yellowjackets can sting repeatedly causing pain

Repairs begin soon on the 4.5-mile northern portion of the Sawyer Camp segment. Ralston Bike Trail is closed for PG&E to work on a gas transmission line until October 31

The area south and west of the park, which was burned by the CZU Lightning Complex Fire, remains closed. Other trails remain closed due to storm damage.

For holiday weekends in 2023, Bicycle Sunday, the weekly event that allows for non-motorized use of Cañada Road along Crystal Springs Regional Trail, will be canceled to meet the increased holiday needs for staffing at other parks in the area. Bicyclists and motorists, please be mindful to share the road.

We are treating up to 100 acres of dense fire fuels in Quarry Park. Some trail closures will occur, Monday through Friday.