Alerts and Closures

The SPCRR Train is Currently Out of Service
The Society for the Preservation of Carter Railroad Resources (SPCRR) train is currently out of service and not operating at this time. We apologize for the inconvenience and appreciate your understanding. Please check back for updates on service restoration. Updated April 28, 2025.

Lake Anza Closure

Lake Anza is closed for swimming on Tuesday, April 29, and Wednesday, April 30, for lake maintenance activities. More info

Partial Trail Closure

MacDonald Trail at Anthony Chabot Park will be closed to all park users between Bort Meadow Staging Area and Park Ridge Drive due to PG&E trail grading work. This closure is scheduled from April 23, 2025 to May 2, 2025 on the weekdays only (Monday-Friday). The trail will be re-opened on Saturdays and Sundays during this time. Park users are advised to consider alternative routes.

Boil Water Advisory
NOTICE TO VISITORS OF PIEDMONT STABLES: The drinking water system serving Piedmont Stables is currently under a Boil Water Advisory. For more information please refer to: Piedmont Stables Water System Boil Water Notice (PDF).   Updated April 28, 2025.

 Tassajara Ridge Closure

The trail between Charbray Street and the Tassajara Ridge is closed to protect natural resources. It will be closed until Sept. 1, 2025.

Delta DeAnza Trail Possible Impacts

Delta DeAnza Trails between Cypress and O'Hara may be impacted from March 17, 2025 to May 16, 2025 between the hours of 8 a.m. and 4 p.m.

Possible delays for construction equipment on trail to enter Contra Costa Water District facility. For questions, contact Contra Costa Water District at 925-688-8218.

ATTENTION: Water Quality Improvement Project At Lake Temescal Underway In Spring Of 2025

More information (PDF)

Point Pinole - Trail Closure
The Bay Trail east of the Atlas Bridge entrance is closed due to a large sinkhole developing between the Union Pacific Railroad tracks and the San Francisco Bay Trail corridor. There is no timeline for reopening. Updated April 28, 2025.

Introduction of a New Invasive Species: Golden Mussels

NOTICE: Upcoming changes to watercraft inspections starting May 7, 2025 due the invasive Golden Mussel, which has recently been identified in North America. KNOW BEFORE YOU GO, visit the Invasive Mussels Page for more information on current inspection procedures.

Trail Closure
Selby Trail from Wildcat Canyon Road to Central Park Drive is closed due to storm damage. Updated April 28, 2025.

Del Valle Regional Park is open with limited amenities

• The Marina Store is open daily with modified hours for boat rentals on a first-come, first-served basis.  Rentals for motorboats, patio boats and canoes can be completed between sunrise and 3:45 p.m.; boats must be returned by 6 p.m.. The store is open between 6 a.m. - 7 p.m. to purchase bait, tackle, fishing licenses, snack and drinks.
• The Camp Store is open 4 p.m. to 8 p.m. on Fridays; 8 a.m. to 8 p.m. on Saturdays; and 8 a.m. to 12 p.m. on Sundays.
• Use caution on storm-damaged trails. Signs are posted.
• Construction equipment/noise may be present during normal working hours.
• The Visitor Center is open. See hours below.

The following amenities remain closed:

• The Swim Beach Food Concession remains closed until further notice.
• Entire Campground is opened with the exception of a few sites located in Lower Phase 2. These sites are under repair. Please contact Reservations if you have questions about cancellations. 
  Call 1-888-327-2757, option 2. *For Canadian residents, please use 510-544-2707.

Shoreline Center

**MLK SHORELINE CENTER TEMPORARY CLOSURE**
The Shoreline Center is temporarily closed for NEW RESERVATIONS AND TOURS.
We look forward to sharing a reopening date with you once that has been determined.
Please check back here for updates in Fall 2025.

Del Valle WEST Swim Beach Water Quality Conditions

• There is a Caution Advisory for blue-green algae posted. See Blue-Green Algae Information for additional details.
• Swim Beach Conditions [PDF] 
• Monitoring Program

No Water

Due to a Contra Costa Water District (CCWD) line break, there is currently no water available at Eckley Pier. CCWD does not have an estimate for when water service will be restored.

Del Valle EAST Swim Beach Water Quality Conditions

• There is a Caution Advisory for blue-green algae posted. See Blue-Green Algae Information for additional details.
• Swim Beach Conditions [PDF] 
• Monitoring Program 

Dry Creek Garden Closures
Due to storm damage Dry Creek Garden is closed until further notice.  Updated April 28, 2025.

Brazilian Room Open House

Due to the fully booked event schedule, tours of the Brazilian Room will not be available outside of Open House. For a full schedule of Open House dates and attending Approved Caterers please see the Brazilian Room Open House Schedule linked below.

• Brazilian Room Open House Schedule

• Pride at the Brazilian Room Seasonal Celebration, June 3, 2025, 4 p.m. - 8:30 p.m.

Rainbow Lake Water Quality Conditions

• A Caution Advisory is posted at Rainbow Lake for blue-green algae. See Blue-Green Algae Information for additional details 

Storm Damaged Trails

• Brandon Trail: between Horseshoe Trail and Stone Bridge 300 feet is inaccessible to equestrians. Please plan alternative routes.
• Willowview Trail is closed.
• Redtail Trail is closed between Brandon Trail and Grass Valley Trail.

Area Closure
The Greathouse Visitor Center and mines are Temporarily Closed. Please check back for updates on reopening dates. Mine tours are unavailable until further notice. Weather permitting, staff is available by the upper parking lot with park information and educational activities Fridays, Saturdays and Sundays 10am-2pm. Programs and walks are still being offered, please click VIEW EVENTS button in the Black Diamond Mines Naturalist Programs box below for details. Updated April 28, 2025.

McCorkle Trail Is Partially Closed
McCorkle Trail is closed between Cerro Este Road and Backpack Road. Sunol Backpack Camp is accessible from Camp Ohlone Road. Updated April 28, 2025.

Emergency Storm Repairs

Please expect delays along the SF Bay Trail at Robert W. Crown Memorial State Beach due to substantial shoreline erosion on the corner of Shoreline Dr. and Westline Dr. Crews are working to prevent further damage, and work will continue on an as-needed basis.

Crown Beach Regional Shoreline Water Quality Conditions

• Swim Beach Conditions [PDF]
• Monitoring Program 

Bathroom Construction Delay

Construction of replacement bathroom facilities at Crown Beach along Shoreline Drive at Grand Street has been delayed. The Park District is working with the City of Alameda to restart construction as soon as possible.

No Open Fires or Barbecues

No open fires or barbecues of any type. Gas-fueled stoves are permitted at Alameda Grove and School Camp only.

Drinking Fountain Unavailable - Riverwalk Staging Area

The drinking fountain at Riverwalk just downstream of the BART tracks is not available. Drinking fountains are available upstream at Niles Staging Area and downstream at Beard Staging Area.

Damaged Trail

The intersection of Briones Crest Trail/ Mott Peak Trail and Briones Crest Trail/ Lagoon Trail is currently damaged but passable with care. Barricades and cones have been posted on both ends of the fire trail to warn park users. Please follow all signage and use caution.

Trail Closure Notice

Sections of the following trails are temporarily closed to safeguard critical habitat in the area:

• Back Ranch Loop Trail - Closed south of the intersection of Chorus Frog Trail
• Goldfinch Trail - Closed south of intersection of Chorus Frog Trail
• Chorus Frog Trail - Closed east of intersection with Tree Frog Trail

Closure is in effect until August 31, 2025.

Lake Anza at Tilden Park Water Quality Conditions

• Swimming will resume Saturday April 26, 2025: open Saturday-Sunday. Starting May 26: open every day.
• There are no advisories posted for blue-green algae at Lake Anza. See Blue-Green Algae Information for additional details.
• Monitoring Program 

Shadow Cliffs Arroyo Water Quality Conditions

• There are no advisories for blue-green algae posted at this time. See Blue-Green Algae Information for additional details.

Trail Partial Closure

Wildcat Creek Trail at the Richmond Parkway undercrossing is currently experiencing seasonal flooding. This trail will be impassable until flood waters recede sometime during the summer of 2025.

Shady Glen Trail Closure
The Shady Glen Trail is currently closed. Updated April 28, 2025.

Trail Equestrian Closure
Due to the recent heavy rains, Golden Spike Trail is closed to equestrian use until further notice.   Updated April 28, 2025.

Thurgood Marshall Regional Park

Thurgood Marshall Regional Park is closed with no public access, however, there are occasional public tour events. Check for upcoming tours or events at Calendar of Events - Thurgood Marshall.

Iron Horse Trail Overcrossing Construction - San Ramon

The north side of the Iron Horse trail adjacent to Bollinger Canyon Road is closed during the construction of an overcrossing, a pedestrian/bike detour is in place. View Map. (At a later date, closure of the south side of the Iron Horse trail adjacent to Bollinger Canyon Road will also be implemented; a pedestrian/bike detour will be in place.)
The overcrossing project began on July 31, 2023, and is expected to take 18-24 months to complete. 

Swim Lagoon Closed Until Further Notice

Due to ongoing renovations, the Contra Loma swim lagoon is closed until further notice.

Trail Closure
The Miwok Trail through Los Vaqueros Watershed and the eastern sections of the Miwok and Manzanita Trails within Morgan Territory Regional Preserve are closed for resource protection until further notice. For questions regarding the closure, please contact Contra Costa Water District. Updated April 28, 2025.

Temporary parking closures due to capacity

Due to increased visitation, primarily on Saturday and Sunday, vehicle access to Coyote Hills may close temporarily. Vehicle access to the park typically reopens when capacity is available, but expect very extended wait times to enter. Additional Parking is available at Dumbarton Quarry Campground.

Please submit any questions or comments using our Contact Us Form.

Water Availability Update
All water is non-potable (filter, treat, or boil for human consumption).

• Eagle Springs - Water available
• Backpack Camp - Water available
• Doe Camp - Water available
• Maggie's Half Acre - Water available
• Boyd Camp - No Water available (use Stromer Springs)
• Stromer Springs - Water available
• Stewart's Camp - Water available

Trail Closure
Stone Corral Trail between Coyote Trail and the junction of Highland Ridge Trail is closed due to storm damage. Updated April 28, 2025.

Trail Closure
Hardy Canyon Trail (Round Valley Regional Preserve) is closed until further notice due to storm damage.  Updated April 28, 2025.

Skyline Trail Partial Closure

Skyline Trail is closed between Fish Ranch Road and Old Tunnel Road Staging Area due to a mudslide. View Map. 

Storm-damaged Trail

A culvert on Leona Trail near Artemisia Trail has failed and is impassible. The trail is not closed as the park can still be accessed from both sides, but the trail no longer connects and the area should be avoided for further landslide issues. View Map.

Storm Damaged Trail Closures
Garin Woods Trail, Ziele Creek Trail, and South Fork Trail are currently closed due to storm damage. Other trails have also sustained some storm damage. Use caution while accessing all open trails in Garin and Dry Creek Pioneer. View Map.  Updated April 28, 2025.

Lake View Trail Partially Closed
The Lake View Trail is closed at the cattle pond due to storm damage. View Map.  Updated April 28, 2025.

Old Moraga Ranch Trail Partially Closed
The Old Moraga Ranch Trail is closed from Sanders Drive to Sanders Ranch Road, due to a landslide.  Updated April 28, 2025.

Lake Temescal Water Quality Conditions

• Temescal is open for “swim at your own risk” April 1 through April 25
• Lifeguard attended swimming begins April 26
• There are no advisories posted for blue-green algae. See Blue-Green Algae Information for additional details.
• Swim Beach Conditions [PDF]
• Monitoring Program 

Coyote Hills Parking Lot Project

The gravel parking lot located at Paseo Padre Parkway and Patterson Ranch Road is closed. View Map.
The existing lot will be replaced by a paved 100-car lot with shade, flush toilets, landscaping, EV charging, bus parking, picnic tables, and wildlife overlooks. The new parking lot is due to open in Spring/Summer 2025 and will be located further up Patterson Ranch Road and will have better pedestrian and vehicle circulation. 
To accommodate early park users, Coyote Hills staff will open the gates to the park at 7am.

Construction Notice - Coyote Hills Restoration and Public Access Project

Trails may be re-routed periodically as needed. There will be a traffic lane shift along Patterson Ranch Road - please use caution. The project is expected to open in Spring/Summer 2025. More information. 

Contra Loma Reservoir Water Quality Conditions

• A Caution Advisory is posted  for blue-green algae. See Blue-Green Algae Information for additional details 

Lake Chabot Water Quality Conditions

• A Danger Advisory for blue-green algae is posted. See Blue-Green Algae Information for additional details.
• Swimming is never permitted at Lake Chabot.

Area Closure Notice - Martin Luther King Jr. Regional Shoreline
Right Dock (south side - Doolittle fishing pier) is closed. Pilings are in need of replacement Updated April 28, 2025.

Keller Beach at Miller/Knox Regional Shoreline Water Quality Conditions

• Swim Beach Conditions [PDF]
• Monitoring Program

Area Closure Notice - On-Going Soil Delivery and Grading Work

This project is part of the Park District’s ongoing efforts to build up the topography of the park to meet the standards of the District’s Oyster Bay Land Use Plan Amendment adopted in 2013. More information.

Lago Los Osos at Quarry Lakes Park Water Quality Conditions

• A Caution Advisory is posted at Lago Los Osos. See Blue-Green Algae Information for additional details.
• Swimming is never allowed and water contact is not permitted at Lago Los Osos.

Trail Closure Notice
Lake Trail is closed due to terrain damage.
The section of Lake View Trail below Stanley Blvd is now open. The lower connector trail from the bridge at North Beach that extends up to Lake View Trail will remain closed until storm damage is repaired. Updated April 28, 2025.

Shadow Cliffs Lake Water Quality Conditions

• There is a Caution Advisory posted for blue-green algae is posted at Shadow Cliffs. See the Blue-Green Algae Information page for additional details.
• Swim Beach Conditions [PDF]
• Monitoring Program 

Shinn Pond at Alameda County Trails Water Quality Conditions

• A Caution Advisory is posted at Shinn Pond for blue-green algae. See Blue-Green Algae Information for additional details.
• Swimming is never allowed at Shinn Pond.

Horseshoe Lake / Niles Swim Beach Water Quality Conditions

• Niles Swim Beach is closed due to a Danger Advisory for blue-green algae posted at Horseshoe Lake. See Blue-Green Algae Information for additional details.
• Swim Beach Conditions [PDF]  
• Monitoring Program

Trail Closure - Briones to Las Trampas Trail

The Briones to Las Trampas Trail from Golden Gate Way to Moraga Blvd. in downtown Lafayette is closed until further notice.

Big Break Regional Shoreline Water Quality Conditions

• There are no advisories posted for blue-green algae at Big Break. See the Blue-Green Algae Information page for additional details.