The Gastineau Channel is a narrow waterway located in southeastern Alaska, separating Douglas Island from the mainland. It stretches approximately 10 miles and serves as a vital route for marine traffic, including ferries and fishing boats. The channel is known for its stunning natural scenery, featuring steep mountains and lush forests along its shores. This channel is also significant for the city of Juneau, the capital of Alaska, which lies at its northern end. The waters of the Gastineau Channel are rich in marine life, making it an important area for local fisheries and wildlife observation.