Natural features

Main article: Southeast Alaska

Also referred to as the Panhandle or Inside Passage, this is the region of Alaska closest to the rest of the United States. As such, this was where most of the initial non-indigenous settlement occurred in the years following the Alaska Purchase. The region is dominated by the Alexander Archipelago as well as the Tongass National Forest, the largest national forest in the United States. It contains the state capital Juneau, the former capital Sitka, and Ketchikan, at one time Alaska's largest city.^[11] The Alaska Marine Highway provides a vital surface transportation link throughout the area, as only three communities (Haines, Hyder and Skagway) enjoy direct connections to the contiguous North American road system.^[12] Officially designated in 1963.^[13]

Interior

Main article: Alaska Interior

Denali is the highest peak in North America.

The Interior is the largest region of Alaska; much of it is uninhabited wilderness. Fairbanks is the only large city in the region. Denali National Park and Preserve is located here. Denali is the highest mountain in North America.

Southwest

Main article: Southwest Alaska

Grizzly bear fishing for salmon at Brooks Falls, part of Katmai National Park and Preserve.

Southwest Alaska is a sparsely inhabited region stretching some 500 miles (800 km) inland from the Bering Sea. Most of the population lives along the coast. Kodiak Island is also located in Southwest. The massive Yukon–Kuskokwim Delta, one of the largest river deltas in the world, is here. Portions of the Alaska Peninsula are considered part of Southwest, with the remaining portions included with the Aleutian Islands (see below).

North Slope

Main article: Alaska North Slope

The North Slope is mostly tundra peppered with small villages. The area is known for its massive reserves of crude oil, and contains both the National Petroleum Reserve–Alaska and the Prudhoe Bay Oil Field.^[14] Barrow, the northernmost city in the United States, is located here. The Northwest Arctic area, anchored by Kotzebue and also containing the Kobuk River valley, is often regarded as being part of this region. However, the respective Inupiat of the North Slope and of the Northwest Arctic seldom consider themselves to be one people^{[citation needed]}.

Aleutian Islands

Main article: Aleutian Islands

More than 300 small volcanic islands make up this chain, which stretches over 1,200 miles (1,900 km) into the Pacific Ocean. Some of these islands fall in the Eastern Hemisphere, but the International Date Line was drawn west of 180° to keep the whole state, and thus the entire North American continent, within the same legal day. Two of the islands, Attu and Kiska, were occupied by Japanese forces during World War II.

Natural features

See also: Wildlife of Alaska

Augustine Volcano erupting on January 12, 2006

With its myriad islands, Alaska has nearly 34,000 miles (54,720 km) of tidal shoreline. The Aleutian Islands chain extends west from the southern tip of the Alaska Peninsula. Many active volcanoes are found in the Aleutians and in coastal regions. Unimak Island, for example, is home to Mount Shishaldin, which is an occasionally smoldering volcano that rises to 10,000 feet (3,048 m) above the North Pacific. It is the most perfect volcanic cone on Earth, even more symmetrical than Japan's Mount Fuji. The chain of volcanoes extends to Mount Spurr, west of Anchorage on the mainland. Geologists have identified Alaska as part of Wrangellia, a large region consisting of multiple states and Canadian provinces in the Pacific Northwest, which is actively undergoing continent building.
One of the world's largest tides occurs in Turnagain Arm, just south of Anchorage – tidal differences can be more than 35 feet (10.7 m).^[15]

Main article: List of lakes in Alaska

Alaska has more than three million lakes.^[16] Marshlands and wetland permafrost cover 188,320 square miles (487,747 km²) (mostly in northern, western and southwest flatlands). Glacier ice covers some 16,000 square miles (41,440 km²) of land and 1,200 square miles (3,110 km²) of tidal zone. The Bering Glacier complex near the southeastern border with Yukon covers 2,250 square miles (5,827 km²) alone. With over 100,000 glaciers, Alaska has half of all in the world.

Land ownership

Alaska has more public land owned by the federal government than any other state.^[17]

According to an October 1998 report by the United States Bureau of Land Management, approximately 65% of Alaska is owned and managed by the U.S. federal government as public lands, including a multitude of national forests, national parks, and national wildlife refuges.^[18] Of these, the Bureau of Land Management manages 87 million acres (35 million hectares), or 23.8% of the state. The Arctic National Wildlife Refuge is managed by the United States Fish and Wildlife Service. It is the world's largest wildlife refuge, comprising 16 million acres (6.5 million hectares).
Of the remaining land area, the state of Alaska owns 101 million acres (41 million hectares), its entitlement under the Alaska Statehood Act. A portion of that acreage is occasionally ceded to organized boroughs, under the statutory provisions pertaining to newly formed boroughs. Smaller portions are set aside for rural subdivisions and other homesteading-related opportunities. These are not very popular due to the often remote and roadless locations. The University of Alaska, as a land grant university, also owns substantial acreage which it manages independently.
Another 44 million acres (18 million hectares) are owned by 12 regional, and scores of local, Native corporations created under the Alaska Native Claims Settlement Act (ANCSA) of 1971. Regional Native corporation Doyon, Limited often promotes itself as the largest private landowner in Alaska in advertisements and other communications. Provisions of ANCSA allowing the corporations' land holdings to be sold on the open market starting in 1991 were repealed before they could take effect. Effectively, the corporations hold title (including subsurface title in many cases, a privilege denied to individual Alaskans) but cannot sell the land. Individual Native allotments can be and are sold on the open market, however.
Various private interests own the remaining land, totaling about one percent of the state. Alaska is, by a large margin, the state with the smallest percentage of private land ownership when Native corporation holdings are excluded.

Climate

Main article: Climate of Alaska

Köppen climate types of Alaska.

Map depicting the climate zones of Alaska.

The climate in Southeast Alaska is a mid-latitude oceanic climate (Köppen climate classification: Cfb) in the southern sections and a subarctic oceanic climate (Köppen Cfc) in the northern parts. On an annual basis, Southeast is both the wettest and warmest part of Alaska with milder temperatures in the winter and high precipitation throughout the year. Juneau averages over 50 in (130 cm) of precipitation a year, and Ketchikan averages over 150 in (380 cm).^[19] This is also the only region in Alaska in which the average daytime high temperature is above freezing during the winter months.
The climate of Anchorage and south central Alaska is mild by Alaskan standards due to the region's proximity to the seacoast. While the area gets less rain than southeast Alaska, it gets more snow, and days tend to be clearer. On average, Anchorage receives 16 in (41 cm) of precipitation a year, with around 75 in (190 cm) of snow, although there are areas in the south central which receive far more snow. It is a subarctic climate (Köppen: Dfc) due to its brief, cool summers.
The climate of Western Alaska is determined in large part by the Bering Sea and the Gulf of Alaska. It is a subarctic oceanic climate in the southwest and a continental subarctic climate farther north. The temperature is somewhat moderate considering how far north the area is. This region has a tremendous amount of variety in precipitation. An area stretching from the northern side of the Seward Peninsula to the Kobuk River valley (i. e., the region around Kotzebue Sound) is technically a desert, with portions receiving less than 10 in (25 cm) of precipitation annually. On the other extreme, some locations between Dillingham and Bethel average around 100 in (250 cm) of precipitation.^[20]
The climate of the interior of Alaska is subarctic. Some of the highest and lowest temperatures in Alaska occur around the area near Fairbanks. The summers may have temperatures reaching into the 90s °F (the low-to-mid 30s °C), while in the winter, the temperature can fall below −60 °F (−51 °C). Precipitation is sparse in the Interior, often less than 10 in (25 cm) a year, but what precipitation falls in the winter tends to stay the entire winter.
The highest and lowest recorded temperatures in Alaska are both in the Interior. The highest is 100 °F (38 °C) in Fort Yukon (which is just 8 mi or 13 km inside the arctic circle) on June 27, 1915,^[21][22] making Alaska tied with Hawaii as the state with the lowest high temperature in the United States.^[23][24] The lowest official Alaska temperature is −80 °F (−62 °C) in Prospect Creek on January 23, 1971,^[21][22] one degree above the lowest temperature recorded in continental North America (in Snag, Yukon, Canada).^[25]
The climate in the extreme north of Alaska is Arctic (Köppen: ET) with long, very cold winters and short, cool summers. Even in July, the average low temperature in Barrow is 34 °F (1 °C).^[26] Precipitation is light in this part of Alaska, with many places averaging less than 10 in (25 cm) per year, mostly as snow which stays on the ground almost the entire year.

Average daily maximum and minimum temperatures for selected locations in Alaska^[27]

Location	July (°F)	July (°C)	January (°F)	January (°C)
Anchorage	65/51	18/10	22/11	−5/–11
Juneau	64/50	17/11	32/23	0/–4
Ketchikan	64/51	17/11	38/28	3/–1
Unalaska	57/46	14/8	36/28	2/–2
Fairbanks	72/53	22/11	1/–17	−17/–27
Fort Yukon	73/51	23/10	−11/–27	−23/–33
Nome	58/46	14/8	13/–2	−10/–19
Barrow	47/34	8/1	−7/–19	−21/–28