Lake Sammamish State Park provides the primary public access to Lake Sammamish, featuring the only public boat launch on the lake with nine lanes, docks, and parking for 250 vehicle/trailer combinations.

The park offers multiple designated access points along the East Lake Sammamish Trail, with gravel pullout areas and street parking available along East Lake Sammamish Parkway.

Additional amenities include kayak and paddleboard rentals at Tibbetts Beach, two swimming beaches, fishing access, and restroom facilities.