Lake Sammamish State Park is a 512-acre day-use park with 6,858 feet of waterfront on Lake Sammamish. The area around the lake was an important culture zone for local Indian tribes for centuries. The park provides deciduous forest and wetland vegetation for the enjoyment of visitors. A salmon-bearing creek and a great-blue-heron rookery are additional features. The park includes diverse natural wetlands, a large great blue heron rookery and the salmon-bearing Issaquah Creek. The park has one of the largest freshwater beaches in the greater Seattle area.to dusk.

The Lake Sammamish area was once a gathering place for Indian tribes. They celebrated their "potlatch," or winter festival, at the south end of the lake, where they hunted, fished and berry-gathered in preparation for winter. The word "Sammamish" comes from the Indian "Samena," meaning "hunter."

A Discover Pass is required for vehicle access to Washington state parks for day use. For more information about the Discover Pass and exemptions, please visit the Discover Pass web page.

The park has no individual camping.

The park has the Hans Jensen youth group camping area. It accommodates up to 200 people and up to 40 cars. There are 36 picnic tables, 12 stoves, a covered picnic shelter and three vault toilets.