The park features a lake, aquatic recreation areas and a golf course which was added in 1923.
The land which makes up Greenfield Park was purchased by Milwaukee County, Wisconsin in 1921.
[3] The park now includes 282.3 acres and features a lagoon with a 0.6 mile circumference and a golf course.
[5] The lagoon/lake is six acres with a depth of 15 feet (4.6 m) and fish in the lake include: largemouth bass and other panfish.
[6] The Oak Leaf Trail Root River Line runs through the park, intersecting with the New Berlin Trail and West Allis Cross-Town Connector near the center of the park.