Cull Canyon Swim Lagoon
Lake · California
ℹ️ Community-reported spot. Details below are compiled from public sources and are reported to be accurate — always verify locally before visiting.
About this swimming hole
Cull Canyon's swim lagoon in Castro Valley offers lifeguarded swimming with a sandy beach and a separate swim complex. The park's reservoir and rolling hills make it a full-day destination. It is one of the East Bay's best staffed swim spots.
Good to know
| Water type | Lake |
|---|---|
| Water temperature | 70s in summer |
| Depth | swim lagoon |
| Best season | June-September |
| Fees | $5 parking |
| Reservations required | No |
| Hours | 11am-6pm summer |
| Parking | park lot |
| Amenities | restrooms, lifeguards, picnic tables |
| County | Alameda County |
| Nearest town | Castro Valley |
| Safety notes | lifeguards on duty in summer |
Map
Nearby swimming holes
Frequently asked questions
Does Cull Canyon Swim Lagoon require reservations?
No reservations are required at Cull Canyon Swim Lagoon based on current information — but verify before you go.
Is there a fee to visit Cull Canyon Swim Lagoon?
Reported fee info: $5 parking. Fees can change — confirm with the official link.
When is the best time to visit Cull Canyon Swim Lagoon?
The best season is typically June-September.
⚠️ Verify before you go. Conditions, fees, reservations, and access can change — confirm details with the official link before visiting. Last verified: September 2026