Aleutian Islands

The Aleutian Islands are a long volcanic island chain in the North Pacific that forms the southwestern edge of Alaska. The chain consists of more than 300 islands and islets extending roughly 1,200 miles west from the Alaska Peninsula toward Russia.

The islands are known for dramatic volcanic landscapes, extensive seabird colonies and rich marine life. Significant commercial fishing operations center on ports such as Unalaska (Dutch Harbor), while remote islands offer birdwatching, kayaking and rugged hiking for experienced visitors. Several islands contain World War II sites and wrecks that draw historians and divers.

Indigenous Unangan (Aleut) peoples have inhabited the islands for millennia. The islands were visited and colonized by Russians in the 18th and 19th centuries, became part of the United States with the purchase of Alaska in 1867, and were the scene of the Aleutian Campaign during World War II in 1942-43.

Geographically the chain sits between the Bering Sea to the north and the North Pacific to the south, forming a bridge toward the Kamchatka Peninsula in Russia. The islands are remote from Alaska’s major population centers and are reached by limited air and sea services from hubs such as Unalaska and Adak.

• Wildlife seasonality: Best wildlife viewing occurs in late spring and summer when large seabird colonies, seals and sea otters are most active and accessible by boat.
• Weather impact: Weather is highly changeable - persistent fog, strong winds and storms are common and can disrupt travel and boat or plane schedules.

What to See#

• Major island groups (examples): A chain of major islands and hundreds of smaller islets stretching roughly 1,200 miles (about 1,900 km) west from the Alaska Peninsula toward the Russian Kamchatka Peninsula. The group includes volcanically active islands, remote fishing ports and several islands that were strategically important in World War II.
• Unalaska / Dutch Harbor: Unalaska (Dutch Harbor) - the largest commercial fishing port in the chain and the main transportation hub for visitors and supplies.
• Adak: Adak - a former U.S. naval and air base that later supported civilian and research activity; one of the larger, more accessible western islands.
• Attu: Attu - the westernmost island in the United States and the site of the 1942-43 Aleutian Campaign; very remote and rarely visited.
• Unimak: Unimak - the largest island by area, home to several volcanoes including Shishaldin, one of the Aleutians’ tallest volcanic peaks.
• Amchitka: Amchitka - noted for mid-20th century military use and later restricted access for a period; sparsely populated now.

The Aleutian Islands are a long chain stretching west from mainland Alaska and are reached island-by-island. Some population centers (for example Unalaska/Dutch Harbor and Adak) have regional airports with scheduled or seasonal flights from Anchorage; many smaller islands require charter aircraft or boat access. Travel planning generally involves flying to a regional hub from Anchorage or joining a ship/cruise that calls at Aleutian ports.

• The best time to visit the Aleutians for wildlife and calmer seas is mid-summer (July-August); outside that window weather is highly variable and many services shut down.
• Access is limited and expensive - travel usually routes through Anchorage to hubs like Unalaska (Dutch Harbor) or via small expedition cruises; book flights, lodgings and guided trips well in advance and expect schedule changes due to weather.
• Many landing sites are remote and require licensed guides or permits (for wildlife colonies, historic wrecks and protected areas), so coordinate with local operators rather than attempting independent shoreings.