Timberline is an alternate term for the tree line. It may also refer to: Places Timberline Lodge, a National Historic Landmark mountain lodge and ski area in Oregon, U.S. Timberline Lodge ski area, the ski area surrounding the lodge Products Timberline Software, owned by Sage Group since September 2003 Schools Timberline High School (Boise, Idaho) Timberline High School (Weippe, Idaho) Timberline High School (Lacey, Washington) See also Timberlane (disambiguation)