Bear Lake was larger originally but its size was reduced by drainage. An 1834 survey shows the lake covered about 1,000 acres and included High and Cub lakes. Natural shoreline areas and wetlands are present today on the south and west sides of the lake. Homes are built on the north and east sides. A beach and state-owned boat ramp are available on the east shore.
Bear Lake is moderately fertile.
Water clarity varies from 3-7 feet. The bottom is mostly sand and muck. Coontail and curly-leaf pondweed are abundant in some areas of the lake, while cattails, spatterdock and water lilies are the major shoreline plants. Permits are issued annually for weed control around boat docks. Fish management at Bear Lake has been directed at establishing a northern pike population.