Mercerdale Park is in the heart of downtown Mercer Island and offers a plaza area, picnic tables, a skate park and a children's play structure. Open space at the center of the park is surrounded by a walking path, and an additional 18.5 acres of forested hillside area to the west, called Mercerdale Hillside Park, is part of the city's Open Space Vegetation Plan. A community sign on the east side of the park (78th Avenue Southeast) announces ongoing community events.