The Kitsap Peninsula lies west of Seattle across Puget Sound, in Washington state in the northwestern US. Hood Canal separates the peninsula from the Olympic Peninsula on its west side. The peninsula, aka "the Kitsap", encompasses all of Kitsap County except Bainbridge and Blake Islands, as well as the northeastern part of Mason County and the northwestern part of Pierce County. The highest point on the Kitsap Peninsula is Gold Mountain. The U.S. Navy's Puget Sound Naval Shipyard, and Naval Base Kitsap (comprising the former NSB Bangor and NS Bremerton) are on the Peninsula. Its main city is Bremerton.