Mackenzie River in the context of "Bering Land Bridge"

The Beaufort Sea (/ˈboʊfərt/ BOH-fərt; French: Mer de Beaufort) is a marginal sea of the Arctic Ocean, located north of the Northwest Territories, Yukon, and Alaska, and west of the Canadian Arctic Archipelago. The sea is named after Sir Francis Beaufort, a hydrographer. The Mackenzie River, the longest in Canada, empties into the Canadian part of the Beaufort Sea west of Tuktoyaktuk, which is one of the few permanent settlements on the sea's shores.

The sea, characterized by a severe climate, is frozen over most of the year. Historically, only a narrow pass up to 100 km (62 mi) opened in August–September near its shores, but recently due to climate change in the Arctic the ice-free area in late summer has greatly enlarged. Until recently, the Beaufort Sea was known as an important reservoir for the replenishment of Arctic sea ice. Sea ice would often rotate for several years in the Beaufort Gyre, the dominant ocean current of the Beaufort Sea, growing into sturdy and thick multi-year ice.

Beringia is a prehistoric geographical region, defined as the land and maritime area bounded on the west by the Lena River in Russia; on the east by the Mackenzie River in Canada; on the north by 72° north latitude in the Chukchi Sea; and on the south by the tip of the Kamchatka Peninsula. It includes the Chukchi Sea, the Bering Sea, the Bering Strait, the Chukchi and Kamchatka peninsulas in Russia as well as Alaska in the United States and Yukon in Canada.

The area includes land lying on the North American Plate and Siberian land east of the Chersky Range. At various times, it formed a land bridge referred to as the Bering land bridge or the Bering Strait land bridge that was up to 1,000 km (620 mi) wide at its greatest extent and which covered an area as large as British Columbia and Alberta together, totaling about 1.6 million km (620,000 sq mi), allowing biological dispersal to occur between Asia and North America. Today, the only land that is visible from the central part of the Bering land bridge are the Diomede Islands, the Pribilof Islands of St. Paul and St. George, St. Lawrence Island, St. Matthew Island, and King Island.

The Inuvialuit Settlement Region (ISR; Inuinnaqtun: Inuvialuit Nunangit Sannaiqtuaq – INS; French: Région désignée des Inuvialuit – RDI), located in Canada's western Arctic, was designated in 1984 in the Inuvialuit Final Agreement by the Government of Canada for the Inuvialuit. It spans 435,000 km (270,000 mi), including 90,650 km (35,000 sq mi) of land and 12,980 km (5,010 sq mi) of subsurface mineral rights. The ISR is mainly above the tree line, and includes several sub-regions: the Beaufort Sea, the Mackenzie River delta, the northern portion of Yukon ("Yukon North Slope", Herschel Island), and the northwest portion of the Northwest Territories. The ISR includes both Crown Lands and Inuvialuit Private Lands. Most of the ISR is represented by Nunakput, the territorial electoral district, meaning "our land" in Inuvialuktun.

The ISR is one of the four Inuit regions of Canada, collectively known as Inuit Nunangat, represented by the Inuit Tapiriit Kanatami (ITK). The other regions include Nunatsiavut in Labrador, Nunavik in northern Quebec, and the territory of Nunavut. The ISR is the homeland of the Inuvialuit. The Inuvialuit Regional Corporation, established in 1986 as the receiver of the lands and financial compensation of the Inuvialuit Final Agreement, is controlled by the Inuvialuit population and is responsible for ISR operations. From 1996 until 2016, Nellie Cournoyea, former Premier of the Northwest Territories, was the Chair and CEO of the Board. She had been elected nine times before declining to run again. In 2016, Duane Ningaqsiq Smith, was elected to replace her, was re-elected in 2019, and acclaimed in 2022.

Tuktoyaktuk (/ˌtʌktəˈjæktʌk/ TUK-tə-YAK-tuk; Inuvialuktun: Tuktuyaaqtuuq [təktujaːqtuːq], lit. 'it looks like a caribou') is an Inuvialuit hamlet near the Mackenzie River delta in the Inuvik Region of the Northwest Territories, Canada, at the northern terminus of the Inuvik–Tuktoyaktuk Highway. One of six Inuvialuit communities in the Inuvialuit Settlement Region, it is commonly known by its first syllable, Tuk (/tʌk/). It lies north of the Arctic Circle on the Arctic Ocean, and is the only place on the Arctic Ocean connected to the rest of Canada by road. Known as Port Brabant after British colonization, in 1950 it became Canada's first Indigenous settlement to reclaim its traditional name.

Clathrate hydrates, or gas hydrates, clathrates, or hydrates, are crystalline water-based solids physically resembling ice, in which small non-polar molecules (typically gases) or polar molecules with large hydrophobic moieties are trapped inside "cages" of hydrogen-bonded, frozen water molecules. In other words, clathrate hydrates are clathrate compounds in which the host molecule is water and the guest molecule is typically a gas or liquid. Without the support of the trapped molecules, the lattice structure of hydrate clathrates would collapse into conventional ice crystal structure or liquid water. Most low molecular weight gases, including O₂, H₂, N₂, CO₂, CH₄, H₂S, Ar, Kr, Xe, and Cl₂ as well as some higher hydrocarbons and freons, will form hydrates at suitable temperatures and pressures. Clathrate hydrates are not officially chemical compounds, as the enclathrated guest molecules are never bonded to the lattice. The formation and decomposition of clathrate hydrates are first order phase transitions, not chemical reactions. Their detailed formation and decomposition mechanisms on a molecular level are still not well understood.Clathrate hydrates were first documented in 1810 by Sir Humphry Davy who found that water was a primary component of what was earlier thought to be solidified chlorine.

Clathrates have been found to occur naturally in large quantities. Around 6.4 trillion (6.4×10) tonnes of methane is trapped in deposits of methane clathrate on the deep ocean floor. Such deposits can be found on the Norwegian continental shelf in the northern headwall flank of the Storegga Slide. Clathrates can also exist as permafrost, as at the Mallik gas hydrate site in the Mackenzie Delta of northwestern Canadian Arctic. These natural gas hydrates are seen as a potentially vast energy resource and several countries have dedicated national programs to develop this energy resource. Clathrate hydrate has also been of great interest as technology enabler for many applications like seawater desalination, gas storage, carbon dioxide capture & storage, cooling medium for data centre and district cooling etc. Hydrocarbon clathrates cause problems for the petroleum industry, because they can form inside gas pipelines, often resulting in obstructions. Deep sea deposition of carbon dioxide clathrate has been proposed as a method to remove this greenhouse gas from the atmosphere and control climate change. Clathrates are suspected to occur in large quantities on some outer planets, moons and trans-Neptunian objects, binding gas at fairly high temperatures.

The Liard River of the North American boreal forest flows through Yukon, British Columbia and the Northwest Territories, Canada. Rising in the Saint Cyr Range of the Pelly Mountains in southeastern Yukon, it flows 1,115 km (693 mi) southeast through British Columbia, marking the northern end of the Rocky Mountains and then curving northeast back into Yukon and Northwest Territories, draining into the Mackenzie River at Fort Simpson, Northwest Territories. The river drains approximately 277,100 km (107,000 sq mi) of boreal forest and muskeg.

Sir Alexander Mackenzie (c. 1764 – 12 March 1820) was a Scottish-Canadian explorer and fur trader known for accomplishing the first crossing of North America north of Mexico by a European in 1793. The Mackenzie River and Mount Sir Alexander are named after him.

As a leading member of the North West Company, he aspired to extend the Company's operations into western Canada and selling those furs in China. His hopes thus were intrusions on the monopoly positions of both the Hudson's Bay Company and the East India Company.