Workers Letting Cyclists Pass

Alerts and Closures

Overview

Know before you go! Review alerts/notices below before heading out to parks. Some trails, park areas, swim facilities, may be temporarily closed -- due to weather or water/algae conditions, park projects, habitat restoration, or repairs and maintenance.

Alert LevelLocationDescription
Other Posted

Construction Notice - Arroyo Parking Lot

  • Arroyo Parking Lot is closed for construction for several weeks from November 17 through December
  • Updated 12/02/2022

Trail Closure Posted

Trail Closure Notice - Lake Trail

  • Lake Trail is closed due to terrain damage.
  • Updated 12/2/2022

No Advisory Posted

Shadow Cliffs Lake Water Quality Conditions

No Water Posted

Eckley Pier & Picnic Area - No Running Water

  • Until further notice, Eckley Pier & Picnic Area is without running water due to Contra Costa Water District pipeline maintenance project.
  • Updated 12/2/2022

Trail Closure Posted

Alameda Creek Trail Entrance Closure

  • Until further notice, the walk-in entrance to the Alameda Creek Paved trail from the downstream (southwestern) sidewalk at Alvarado Blvd (Fremont Blvd) will be temporarily CLOSED due to safety concerns.
  • Updated 12/2/2022

Trail Closure Posted

Trail Closure Notice - Trail & Staging Area

  • The Wilcox Station Staging Area and McCosker Loop Trail will be CLOSED for construction, from June 2020 to Spring 2023, for creek restoration and public access enhancements. The project restores over 3,000 feet of creek habitat, including daylighting 2,800 feet, previously culverted underground.
  • Updated 12/2/2022

Trail Closure Posted

Trail Closure Notice - Anthony Chabot Trails

  • Mirador Trail is closed from the Two Rock Trail to the trail end of Mirador Trail.
  • MacDonald to Grass Valley Connector Trail is closed due to damage caused by rainstorm.
  • Updated 12/2/2022

Area Closure Posted

Area Closure Notice - ADA Pier

  • Until further notice, the ADA pier at Quarry Lakes is CLOSED due to low lake water levels.
  • Updated 12/2/2022

Caution Advisory Posted

Shinn Pond at Alameda County Trails Water Quality Conditions

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

Caution Advisory Posted

Horseshoe Lake / Niles Swim Beach Water Quality Conditions

Trail Closure Posted

Trail Closure Notice - Lafayette-Moraga Regional Trail

  • Until further notice, the Valle Vista to Westchester section of the Lafayette Moraga Trail is CLOSED.  This closure only affects the last half-mile on the Moraga end. The remaining 7 miles from Lafayette into Moraga is open for normal trail activity.
  • Updated 12/2/2022

Other Posted

Reporting Swimmer's Itch

To report cases of Swimmer's Itch please call Alameda County Environmental Health (510) 567-6700 or East Bay Park's Water Management 510-544-2328

Trail Closure Posted

Trail Closure Notice - Carquinez Overlook Trail

  • The northern spur of the Carquinez Overlook Trail that runs through the Eucalyptus grove is closed due to hazardous trees and unsafe trail conditions.
  • The Access road from the end of Prospect Ave is closed due to hazardous trees and unsafe trail conditions.
  • Map of trail closures.
  • Updated 12/2/2022

No Advisory Posted

Crown Beach Regional Shoreline Water Quality Conditions

Trail Closure Posted

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.
  • Updated 12/2/2022

Caution Advisory Posted

Big Break Regional Shoreline Water Quality Conditions

Area Closure Posted

Area Closure Notice - Roberts Pool

  • Roberts Pool is closed through Spring 2023 for facility upgrades, renovation, and replacement. More info.
  • Updated 12/2/2022

Park Rule Violations

To report an Emergency or Crime/Suspicious Activity in Progress,
call 911 or (510) 881-1121 from a cell, 24 hours a day.

To report Non-Emergency Park Rule Violations such as reckless bike/skate/scooter riding, failure to properly leash or control pets, and improper trail usage such as eBikes or mountain bikes on restricted trails, please call our Non-Emergency Public Safety Dispatch at (510) 881-1833, 24 hours a day, or submit a Park Watch Report online at the link below.

For Non-Emergency Trail Safety Hazards or Damaged Trails/Facilities, locate a park ranger or call Park Operations at (510) 544-2510 (Mon-Fri, 8:30am-5pm, voicemail available after hours or call the Non-Emergency Dispatch line above).
 

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