Old Man Lake Park includes Old Man Lake, Beaver Lake and a portion of McBreirie Lake, as well as the land surrounding and connecting the lakes. The park is an ecologically significant complex of small lakes, marshy shorelines and wetlands. As a result of the abundant aquatic vegetation, the area is an important feeding area for migratory birds and contains locally rare breeding populations of black tern and yellow-headed blackbirds. The park contains natural grasslands located on the south-facing slopes that are frequented by moose and deer. Recreational use in the park includes canoeing, hiking, and wildlife viewing.