Magnuson Park is a park in the Sand Point neighborhood of Seattle, Washington, United States. At 350 acres it is the second-largest park in Seattle, after Discovery Park in Magnolia. Magnuson Park is located at the site of the former Naval Station Puget Sound, on the Sand Point peninsula with Pontiac and Wolf bays that juts into Lake Washington in northea…Magnuson Park is a park in the Sand Point neighborhood of Seattle, Washington, United States. At 350 acres it is the second-largest park in Seattle, after Discovery Park in Magnolia. Magnuson Park is located at the site of the former Naval Station Puget Sound, on the Sand Point peninsula with Pontiac and Wolf bays that juts into Lake Washington in northeast Seattle.