Alaska’s Coastal Landmarks
Lighthouses Across Alaska’s Waters
Explore the lights that guided vessels through Alaska’s island passages, rugged approaches, and remote coastal routes—from Mary Island to Point Retreat and beyond.
Why Alaska Needed Coastal Lights
Alaska’s shoreline stretches across island chains, narrow channels, exposed headlands, and distant harbors. As fishing fleets, steamships, and supply vessels traveled these waters, dependable lights helped mariners identify landfalls and navigate hazardous approaches—especially where fog, darkness, and severe weather could obscure the coast.
Each structure reflects a particular route and community. Mary Island Light marked an approach near Ketchikan, while Point Retreat Light served traffic in Southeast Alaska’s Inside Passage. Together with lights elsewhere along the coast, they reveal how navigational needs varied across a vast maritime landscape.
A Timeline of Alaska’s Coastal Lights
From territorial-era construction to modern operation, Alaska’s lights evolved alongside the vessels and communities that depended on coastal navigation.
1867
A New American Coastline
After the Alaska Purchase, the United States took responsibility for navigation across an immense, sparsely charted coastline.
1890s
Maritime Traffic Grows
Mining, fishing, and expanding steamship service increased demand for reliable markers along Southeast Alaska’s busy waterways.
1903
Mary Island Light Established
A light station began operating on Mary Island, helping vessels navigate the approaches to Ketchikan and nearby passages.
1904
Point Retreat Light Established
A light was established at Point Retreat on Admiralty Island to aid vessels traveling through the northern Inside Passage.
1939
Coast Guard Stewardship Begins
When the U.S. Lighthouse Service merged into the Coast Guard, responsibility for Alaska’s federal light stations transferred with it.
Late 20th century
Automation Changes the Watch
Automated equipment reduced the need for resident keepers, while many historic light structures remained landmarks on Alaska’s coast.
Lights Across Alaska
Mary Island Light
Southeast Alaska · Revillagigedo Channel
On Mary Island near Ketchikan, this light marks a route used by vessels entering Southeast Alaska’s Inside Passage.
Point Retreat Light
Southeast Alaska · Admiralty Island
At the northern tip of Admiralty Island, this light helps guide traffic toward the approaches to Lynn Canal.
Cape Spencer Light
Gulf of Alaska · Cross Sound
Standing near the entrance to Cross Sound, Cape Spencer Light marks a passage between the Gulf of Alaska and Southeast Alaska’s inland waterways.
Mary Island: A Light at Alaska’s Southern Gateway
Mary Island Light stands on Mary Island, south of Ketchikan, beside Revillagigedo Channel. Established in 1903, the station helped vessels find their way through the waters linking Southeast Alaska with the coast to the south. Its position made it an important aid for ships traveling the Inside Passage, where islands, channels, and changing weather demand careful navigation. The light remains a tangible link to the development of maritime routes that connected Alaska’s coastal communities.
Point Retreat and the Approach to Lynn Canal
Point Retreat sits at the northern end of Admiralty Island, where vessels heading toward Lynn Canal pass through the waters around northern Southeast Alaska. A light was established here in 1904, during an era when maritime travel was essential to communities and commerce across the region. The station’s location gave navigators a recognizable reference at a consequential turn in the route toward Juneau and the communities farther north.
Alaska Lighthouses documents Point Retreat through publicly available maritime history, placing its light within the wider network of aids that helped vessels travel these channels. Our mission is to make the stories and settings of Alaska’s lighthouse and light structures accessible, while showing why their locations mattered to the people who relied on coastal navigation.
Many Lights, One Vast Coastline
Alaska’s navigational lights span island passages, exposed headlands, and busy approaches. Their histories include staffed light stations, surviving lighthouse buildings, and aids that later became automated; each site has its own documented story.
Historic Light Stations
Explore places such as Mary Island Light, where a coastal landmark reflects the history of navigation in Southeast Alaska.
Headland Landmarks
Point Retreat and other prominent sites help illustrate how geography shaped the placement of lights along Alaska’s waterways.
Changing Aids to Navigation
Not every listed light is a traditional lighthouse. Some sites have changed structures or equipment over time, so each page distinguishes the historic station from its later aids.
Sources for Further Reading
Official Records
Published Overviews
Follow the Lights Along Alaska’s Coast
Visit the individual pages for Mary Island, Point Retreat, and other listed sites to discover each light’s location, documented history, and place in Alaska’s maritime story.