The park includes a wooded area with trails, a softball/baseball field with bleachers, two playgrounds, and a picnic shelter.
[3] In 2017, the park was a subject of controversy in response to the city's proposal to convert part of the wooded area into a maintenance facility.
[4] After a series of "Save Hamlin Park" protests from city residents, the proposal was withdrawn.
[7] In 1910, Ole Hanson’s North Seattle Improvement Company purchased the land to develop it into the city of Lake Forest Park.
[10] In 1948, community clubs and civic groups campaigned to have wooded land north of the Firland Sanatorium owned by the state added to the eight acre park.