Alexander Archipelago in the context of "Sitka, Alaska"

Gastineau Channel (Lingít: Séet Ká) is a channel between the mainland of the U.S. state of Alaska and Douglas Island in the Alexander Archipelago of southeastern Alaska. It separates Juneau on the mainland side from Douglas (now part of Juneau), on Douglas Island. The first European to sight the channel was Joseph Whidbey whilst serving on the Royal Navy's Vancouver Expedition early in August 1794, first from the south and later from the west. It was probably named for John Gastineau, an English civil engineer and surveyor.

The Tongass National Forest (/ˈtɒŋɡəs/) in Southeast Alaska is the largest U.S. National Forest at 16.7 million acres (26,100 sq mi; 6,800,000 ha; 68,000 km), an expanse larger than 10 U.S. states and 75 U.N. member nations. Most of its area is temperate rain forest and is remote enough to be home to many species of endangered and rare flora and fauna. The Tongass, which is managed by the United States Forest Service, encompasses islands of the Alexander Archipelago, fjords and glaciers, and peaks of the Coast Mountains. An international border with Canada (British Columbia) runs along the crest of the Boundary Ranges of the Coast Mountains. The forest is administered from Forest Service headquarters offices in Ketchikan. There are local ranger district offices located in Craig, Hoonah, Juneau, Ketchikan, Petersburg, Sitka, Thorne Bay, Wrangell, and Yakutat.

Haida Gwaii (/ˈhaɪdə ˈɡwaɪ/; Haida: X̱aaydag̱a Gwaay.yaay / X̱aayda gwaay, literally "Islands of the Haida people"), previously known as the Queen Charlotte Islands, is an archipelago located between 55–125 km (34–78 mi) off the northern Pacific coast in the Canadian province of British Columbia. The islands are separated from the mainland to the east by the shallow Hecate Strait. Queen Charlotte Sound lies to the south, with Vancouver Island beyond. To the north, the disputed Dixon Entrance separates Haida Gwaii from the Alexander Archipelago in the U.S. state of Alaska.

Haida Gwaii consists of two main islands: Graham Island (Kiis Gwaay) in the north and Moresby Island (Haida: T'aawxii X̱aaydag̱a Gwaay.yaay linag̱waay, lit. 'south people island half', or Gwaay Haanas "Islands of Beauty") in the south, along with approximately 400 smaller islands with a total landmass of 10,180 km (3,931 sq mi). Other major islands include Anthony Island (Sg̱ang Gwaay), Burnaby Island (Sg̱aay Kun Gwaay.yaay), Langara Island (Kiis Gwaay), Lyell Island (Athlii Gwaii), Louise Island, (Ḵ'uuna Gwaay), Alder Island and Kunghit Island (G̱angx̱id Gwaay).

Prince of Wales Island (Tlingit: Taan) is one of the islands of the Alexander Archipelago in the Alaska Panhandle. It is the fourth-largest island in the United States (after Hawaii, Kodiak Island, and Puerto Rico) and the 97th-largest island in the world.