Resort facilities

Limited swimming facilities available at regional parks for Memorial Day weekend, 2022 swim season

Cull Canyon Swimming Complex. Photo by Jennifer Vanya. Source: BERPD

All East Bay Regional Parks will be open this Memorial Day for annual holiday gatherings and celebratory festivities. Parks are expected to be busy and some at capacity early, so park staff recommend arriving early to ensure picnic sites are first-come, first-served and non-reservable.

Many supervised swimming areas will also be open to visitors, including Castle Rock Pool at Diablo Foothills in Walnut Creek, Cull Canyon in Castro Valley, Don Castro in Hayward and Lake Temescal in Oakland. Unsupervised beaches include Keller Beach in Miller Knox Regional Park in Richmond and Robert Crown Memorial State Beach in Alameda. Unfortunately, many of the Park District’s most popular swimming areas, including Del Valle, Shadow Cliffs and Lake Anza, will be closed due to water quality, low water or construction and maintenance repairs .

“We regret the inconvenience and limitations to public use of all of our swimming facilities,” said Dave Mason, public information supervisor.

Park District swimming facilities face ongoing challenges from climate change, including cyanobacteria (blue-green algae) and low water levels. Water quality is tested regularly during swimming season to ensure it is safe for the public. Visitors should check the status of swimming facilities before leaving by visiting

Swimming facilities open for Memorial Day weekend:
• Castle Rock Pool – OPEN May 28
• Cull Canyon Swimming Lagoon – OPEN
• Don Castro Swim Lagoon – OPENING May 28
• Lake Temescal Swimming Beach – OPEN May 28

Swimming areas closed for Memorial Day weekend:
• Contra Loma Swim Lagoon – CLOSED for swim season due to required maintenance and safety repairs.
• Lake Anza Swimming Beach – CLOSED due to scheduled maintenance and continued uncertainty over water quality.
• Del Valle Swim Beach – CLOSED due to blue-green algae.
• Quarry Lakes Swim Beach – CLOSED due to blue-green algae.
• Roberts Pool – CLOSED for renovations and construction of a new pool.
• Shadow Cliffs Swimming Beach – CLOSED due to extreme drought and low water levels.

Bathing fees vary by facility. However, swimming is free for members of the Regional Parks Foundation. To find out how to become a member of the Regional Parks Foundation, visit

Walk-in tours for all open locations will be available on a first-come, first-served basis until capacity is reached. Cull Canyon and Don Castro also offer optional swim registration on weekends and holidays to guarantee admission. To reserve your entry to the all-day swimming, register on

The East Bay Regional Park District is the nation’s largest regional park system, featuring 73 parks, 55 miles of shoreline, and more than 1,300 miles of trails for hiking, biking, horseback riding, and environmental education. The Park District receives more than 25 million visits annually in Alameda and Contra Costa counties in the San Francisco Bay Area.