Nov 1 - Jan 31: 7am - 4pm
Feb 1 - Mar 31: 6am - 5pm
Apr 1 - May 31: 6am - 6pm
Memorial Day-Labor Day: 6am - 6pm
Day after Labor Day - Oct 31: 6am - 5pm
Lifeguards are on duty: Weekends & Holidays: May - Sep plus Mon - Fri in Jun - Aug
Lifeguard Hours: 11am – 6pm
Located in the Quarry Lakes Regional Recreation Area, the Horseshoe Lakes (Niles Beach) swim complex includes a sandy beach, a bathhouse, vending machines, and lifeguard service, and is open year round.
When lifeguards are not on duty, swimming at your own risk is allowed within the roped-off swim area only (see the Lifeguard Service Schedule above).
A beach wheelchair is available free of charge on a first-come, first-served basis. See Park Accessibility on Quarry Lakes park page for more information.
Fees and requirements: Group Swim Procedures
Payment by cash (no bills over $20), Visa or MasterCard. No Checks.
Once the swim facility capacity is reached, there will be no new entries allowed for the remainder of the day. Please take this into consideration when you are planning your visit.
Swim Beach Water Quality Conditions
Quarry Lakes' Niles Beach is tested for bacterial levels weekly from April to October and twice a month from November to March. The map below indicates the two sample sites on the beach. The East Bay Regional Park District works with the Alameda County Environmental Health Department in accordance with California Department of Public Health's Guidance for Fresh Water Beaches to determine water quality at Niles Beach. Our stop light sign is used to display the relative water quality from our latest bacteriological tests and cyanobacteria (blue-green algae) conditions.
Water Quality Stop Light Designations:
Please be advised there is always some level of risk when swimming in any water body. To have a fun and safe experience swimming in the parks, we encourage you to follow a few simple rules:
* Keep water out of your mouth
* After you leave the water, shower and towel dry as soon as possible
* Do not swim in the lake for 3 days after a rainstorm
* Check posted signs for water quality information
For more information contact the East Bay Regional Park District Water Management Department at (510) 544-2328