Lake Sammamish State Park
Lake · Washington
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
Lake Sammamish State Park's Sunset Beach offers lifeguarded summer swimming on the big Eastside lake. The sandy beach and shaded picnic areas make it a family favorite. It is the Eastside's premier lake swim.
Good to know
| Water type | Lake |
|---|---|
| Water temperature | 70s in summer |
| Depth | swim beach at Sunset Beach |
| Best season | June-September |
| Fees | $10 day use (Discover Pass) |
| Reservations required | No |
| Hours | 8am-dusk |
| Parking | large park lots |
| Amenities | restrooms, picnic tables, boat launch |
| County | King County |
| Nearest town | Issaquah |
| Safety notes | lifeguards in summer at Sunset Beach; boat traffic |
Map
Nearby swimming holes
Frequently asked questions
Does Lake Sammamish State Park require reservations?
No reservations are required at Lake Sammamish State Park based on current information — but verify before you go.
Is there a fee to visit Lake Sammamish State Park?
Reported fee info: $10 day use (Discover Pass). Fees can change — confirm with the official link.
When is the best time to visit Lake Sammamish State Park?
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