The Raven Rock Mountain Complex is a deep underground military installation located near Blue Ridge Summit, Pennsylvania, United States. It serves as a Continuity of Government (COG) facility designed to house military leadership and critical government operations in the event of a national emergency or nuclear attack. The complex is part of the United States' Cold War-era strategic defense infrastructure, alongside similar facilities such as Mount Weather Emergency Operations Center in Virginia and Cheyenne Mountain Complex in Colorado.
Its remote mountain location provides natural protection and concealment.