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 > East Bay Regional Park District | Healthy Parks Healthy People > Parks > Cull Canyon Regional Recreation Area

Park Info

18870 Cull Canyon Road
Castro Valley, CA 94546
(between Heyer Ave. & Columbia Dr.)

Phone Numbers
Toll Free: 888-EBPARKS (888-327-2757), option 3, extension 4523

Local Weather

View Trail Map
Download PDF Map
Google Map

Panorama Panorama

Swim Lagoon Hours
Weekends & Holidays:
  Apr 30 – Sep 5 
   11:00am - 6:00pm
Mon - Fri:
  May 31 - Aug 19
   11:00am - 6:00pm

Gate Hours
Mar - Nov
  8:00am - 10:00pm
Dec - Feb
  8:000am - 8:00pm

Park Hours
Open between 5:00am and 10:00pm unless otherwise posted or permitted
Swim Lagoon Hours: See hours above.

Park Events
Click HERE for upcoming events

Parking Fee
No fee

Dog Fee
No fee. No dogs allowed inside fenced swim area.

Grazing Information
Grazing in the Parks

Beach Access Fee
See the Swim Facilities page

Camping Reservations
No reservable campgrounds

Picnic Reservations
1-888-EBPARKS or 1-888-327-2757, press option 2

Emergency Number

EBRPD Headquarters
1-888-EBPARKS or 1-888-327-2757

Cull Canyon Regional Recreation Area

Cull Canyon Regional Recreation Area



During a closure due to full capacity, guests may not be permitted into the lagoon area until deemed safe by Park staff.

About The Park

This popular Castro Valley swimming spot is only a short drive north from Interstate 580 on Cull Canyon Road in Castro Valley.

Submit Your Photos to the EBRPD Photo Pool

When the swim area was constructed, a secondary dam was built to provide an inner swimming area complete with sandy beach. Never previously tried, this innovation made the swim area water level independent of the reservoir's, unaffected by summer draw-downs.

The lagoon won the 1966 Governor's Design Award for Exceptional Distinction for Recreational Development in the category of landscape.

Park ActivitiesCull Canyon

The swim complex is open during swim season with lifeguard service. For current hours of operation and lifeguard service schedule, visit the Swim Facilities page.

The swim complex includes a bathhouse, vending machines, and the 1.5-acre swim lagoon. It is ideal for families with small children who will enjoy splashing in the shallows and playing on the white sandy beach. Inside the swim complex there are two reservable picnic areas. (Beach access fee to enter swim area.)

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.

To Reach The Park

  • From I-580 eastbound in Castro Valley, take the Grove Way exit.  Turn to the north (left) on Grove Way.  Turn left onto Cull Canyon Road and continue to the park entrance on the left hand side.
  • From I-580 westbound, take the Castro Valley exit and continue west (left) on Castro Valley Blvd. to Crow Canyon Road. Turn right on Crow Canyon, then left on Cull Canyon Road and continue to the park entrance on the left.

Click here for public transit information.

Trail Map

Click the map image below to see an enlarged version.

Trail Map

Directions for navigating the enlarged map:
When the enlarged version of the map opens click on the 'Full Expand' icon in the lower right hand corner of the map to see the 'Actual Size' map.


'Full Expand' icon > Full Expand

When the 'Actual Size' map is viewable, you can 'Click-Hold and Drag' the mouse button (left on a PC) to reposition the map, as desired.

'Single-Click' on the 'Enlarged' or 'Actual Size' map to return to the park page.