The closure to Ralston Bike Trail, a popular connector trail to Crystal Springs Regional Trail, has been extended through Tuesday, December 12, due to delays in paving because of rain.

On Wednesday, December 6, from 8 a.m. to 1 p.m., the Crystal Springs Dam Bridge will be closed to vehicle traffic at SR35-Skyline Blvd and Crystal Springs Road to Bunker Hill Drive and Hwy 92.

Magic Mountain & Beach playgrounds closed Dec 11–12. The playground near Eucalyptus Picnic Area in Coyote Point Recreation Area is closed until replacement parts and repairs can be made.

Tuesday–Friday, December 5–8, Pillar Point Bluff's Jean Lauer Trail will be partially closed as crews return to remove dead and unhealthy Monterey Pine on the eastern boundary of the park near the Pillar Ridge Complex.

From Monday through Wednesday, December 4–6, weather permitting, San Mateo Parks and contractors will work to control regrowth of invasive Eucalyptus across two acres on the northwest boundary of San Bruno Mountain Park, near properties along Florence St. and Mountain View Dr.

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.

The San Mateo County Parks Office will be closed for the holidays, Nov 23–24 & Dec 25–Jan 1.

Please use caution when using the stairs to access the beach at Fitzgerald Marine Reserve. Bridge replacement in progress, but delivery is not expected until December or early January.

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.

Safety inspections show need to replace some play structure parts.

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