The Willamette National Forest is a National Forest located in the central portion of the Cascade Range of the U.S. state of Oregon. It comprises . Over 380,000 acres (694 mi2, 1,540 km2) are designated wilderness which include seven major mountain peaks. There are also several National Wild and Scenic Rivers within the forest. The forest is named for the Willamette River, which has its headwaters in the forest. The forest headquarters are located in the city of Springfield. There are local ranger district offices in McKenzie Bridge, Detroit, Sweet Home, and Westfir. The forest is famous for being at the center of the controversy between the logging industry and the endangered species status of the northern spotted owl. Environmentalists maintain that the forest was aggressively clear-cut for many years threatening a federally listed endangered species. The timber industry contends that the forest can simultaneously provide lumber jobs and wildlife habitat. Since April 1994, the forest is governed by the Northwest Forest Plan, which restricts, but does not eliminate, logging in potential spotted owl habitat. The forest stretches for over 100 miles (160 km) along the western slopes of the Cascade Range in Western Oregon. It extends from the Mount Jefferson area east of Salem to the Calapooya Ridge which divides the watersheds of the Willamette and Umpqua rivers. Most of the forest (about 61%) is located in Lane County, but there are large areas in Linn, Marion, and Douglas counties, as well as much smaller areas in Clackamas and Jefferson counties. Geography The elevation of the forest ranges from about 1,500 feet (460 m) above sea level on the western edge of the forest to almost 10,500 feet (3,200 m) at the top of Mount Jefferson, Oregon's second highest peak. Seven major peaks of the Cascades—Mount Jefferson, Mount Washington, Three Fingered Jack, Diamond Peak, North, Middle and South Sisters—as well as numerous high mountain lakes are within these wilderness areas. The McKenzie River and the North Fork Middle Fork Willamette River are Wild and Scenic rivers. Climate The Willamette National Forest receives 80 to 150 inches (2,000 to 3,800 mm) of precipitation each year from moist onshore Pacific Ocean flow which encounters adiabatic cooling rising over the Cascades. Much of the precipitation is received in the form of snow which accumulates in higher elevations from October through April. The rain and snow melt drain into the McKenzie, Santiam, and