The Pine River watershed is approximately 502,400 acres in size. The watershed drainage for the Pine River contains parts of Aitkin, Cass, Crow Wing and Hubbard counties. Pine River and Crosslake are the major cities in the watershed.
The Pine River watershed contains 586 stream and river miles of various sizes, and 441 lakes greater than 10 acres. Land ownership in the Pine River Watershed is 56% privately held and over 40% is state-owned land. The watershed is 51% forested, 21% wetlands, and 13% open water. The watershed contains numerous heavily developed lakes. The majority of the lakes are important recreational resources and economic benefits to the watershed.
Several lakes are impaired for aquatic consumption (mercury).