The White Mountain National Forest (WMNF) is a federally managed forest contained within the White Mountains in the northeastern United States. It was established in 1918 as a result of the Weeks Act of 1911; federal acquisition of land had already begun in 1914. It has a total area of 750,852 acres (303,859Â ha) (1,225 sq mi). Most of the WMNF is in New Hampshire; a small part (about 5.65% of the forest) is in the neighboring state of Maine. Conservationist and community activist Katherine Sleeper Walden was instrumental in securing at-risk land for the forest, including thousands of acres in the region surrounding the locally famous Bowl near Wonalancet.
While sometimes called a park, it is a national forest, used for logging and other limited commercial purposes in addition to recreational activities. The WMNF is the only national forest located in either New Hampshire or Maine, and is the most eastern national forest in the United States. Most of the major peaks over 4,000 feet high in New Hampshire are located in the national forest. Over 100 miles (160Â km) of the Appalachian Trail traverses the White Mountain National Forest. In descending order of land area the forest lies in parts of Grafton, Coos, and Carroll counties in New Hampshire, and Oxford County in Maine.