Google Maps: https://goo.gl/maps/QghE6sFQbUt
Driving Directions: From I-90, take Exit 15. Follow signs for Lake Sammamish State Park, and go north on 17th Ave NW. Turn left onto NW Sammamish Rd. The entrance to Lake Sammamish State Park will be on your right in about one half mile.
Once inside the state park take the first left towards Tibbetts Beach Parking Lot.
[47.55389, -122.069477]