Timberline is an alternate term for the tree line.

It may also refer to:

• 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

• Timberline Software, owned by Sage Group since September 2003

• Timberline High School (Boise, Idaho)
• Timberline High School (Weippe, Idaho)
• Timberline High School (Lacey, Washington)

• Timberline Church, Fort Collins, Colorado
• Timberline Church, Aztec. New Mexico

• Timberlane (disambiguation)