18870 Cull Canyon Road, Castro Valley, CA 94546
(Heyer Ave. at Columbia Dr.)
Parking: No fee
Dog: No fee. No dogs allowed inside fenced swim area
Open between 5am to 10pm unless otherwise posted or permitted.
Mar - Nov
8am - 10pm
Dec - Feb
8am - 8pm
NOTICE: If parking and or swim capacity is reached, entrance gates may close for the day.
Swim Facilities Schedule
Toll Free: 888-EBPARKS (888-327-2757), option 3, extension 4523
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This popular Castro Valley swimming spot is only a short drive north from Interstate 580 on Cull Canyon Road in Castro Valley.
The lagoon won the 1966 Governor's Design Award for Exceptional Distinction for Recreational Development in the category of landscape.
When the swim area was constructed, a secondary dam was built to provide an inner swimming area complete with a sandy beach. Never previously tried, this innovation made the swim area water level independent of the reservoir's, unaffected by summer draw-downs.
Swim Facilities Capacity Notice
Once the swim facility capacity is reached, there will be no new entries allowed for the remainder of the day (or at the discretion of the Park Supervisor), for the safety of the public. Please take this into consideration when planning your visit.
There are several reservable picnic areas outside the swim complex. For information, call 1-888-EBPARKS or 1-888-327-2757, press option 2.
Cull Canyon also is on the Chabot-to-Garin Regional Trail, which is being developed between the two parks. The trail runs along the east side of Cull Canyon Reservoir, then heads north for six miles through East Bay Municipal Utility District property to EBMUD's Chabot Staging Area on Redwood Road (an EBMUD hiking permit is required for this section, phone 287-0459). From here the Willow View Trail leads into Anthony Chabot Regional Park.
Click the map image below to see an enlarged version.
> Park Map [PDF]