Forestland covering 4,331,000 acres (1,753,000 hectares) comprises about 10% of the state's land area. Forests in the northern two-thirds of the state are predominately located in the northwestern part of the state and along major rivers and streams. The majority of Illinois's forests are located in the southern one-third of the state. Some 4,087,000 acres (1,654,000 hectares) are classified as commercial forests and are 90% privately owned. As of 2003 Illinois had two national forests, with a total National Forest System acreage of 857,000 acres (347,000 hectares). In 2002, lumber production totaled 130 million board feet.