The Public Works Department is responsible for the maintenance of 6 parks in Cosmopolis including Mill Creek Park and Makarenko Park. Mill Creek Park holds the annual Festival in the Park on the second Sunday in September.
Makarenko Park is a 39 acre park that was donated to the City of Cosmopolis by Major D. S. Makarenko . This park consists of over two miles of paved & gravel trails for walking, running, and biking. Aberdeen School District uses this park for its high school cross-country meets in the fall. Makarenko Park also has a Community Garden Program where members of the community can rent a 4’ X 16 ‘garden plot for the summer to grow vegetables. The park also has two soccer fields used by Grays Harbor Youth Soccer for games in both the spring and fall leagues.