Blue Lakes
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
Twin spring-fed lakes along Highway 20 with remarkably clear blue water. Public access points and a county park provide swimming amid the oaks. The upper lake is the clearer of the two.
Good to know
| Water type | Lake |
|---|---|
| Water temperature | 70s in summer |
| Depth | Clear spring-fed water |
| Best season | May-September |
| Reservations required | No |
| Parking | Roadside pullouts and county park |
| County | Lake County |
| Nearest town | Upper Lake |
| Safety notes | No lifeguards |
Map
Nearby swimming holes
Frequently asked questions
Does Blue Lakes require reservations?
No reservations are required at Blue Lakes based on current information — but verify before you go.
When is the best time to visit Blue Lakes?
The best season is typically May-September.
Is Blue Lakes safe for swimming?
Reported safety notes: No lifeguards. There are rarely lifeguards at natural swimming holes — swim at your own risk.
⚠️ Verify before you go. Conditions, fees, reservations, and access can change — confirm details with the official link before visiting. Last verified: September 2026