St. Lawrence Island in the context of "Bering Land Bridge"

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.

Central Alaskan Yupʼik (also rendered Yupik, Central Yupik, or indigenously Yugtun) is one of the languages of the Yupik family, in turn a member of the Eskimo–Aleut language group, spoken in western and southwestern Alaska. Both in ethnic population and in number of speakers, the Central Alaskan Yupik people form the largest group among Alaska Natives. As of 2010 Yupʼik was, after Navajo, the second most spoken aboriginal language in the United States. Yupʼik should not be confused with the related language Central Siberian Yupik spoken in Chukotka and St. Lawrence Island, nor Naukan Yupik likewise spoken in Chukotka.

Yupʼik, like all Eskimo languages, is polysynthetic and uses suffixation as primary means for word formation. There are a great number of derivational suffixes (termed postbases) that are used productively to form these polysynthetic words. Yupʼik has predominantly ergative alignment: case marking follows the ergative pattern for the most part, but verb agreement can follow an ergative or an accusative pattern, depending on grammatical mood. The language grammatically distinguishes three numbers: singular, dual, and plural. There is no marking of grammatical gender in the language, nor are there articles.

The First Kamchatka Expedition was the first Russian expedition to explore the Asian Pacific coast. It was commissioned by Peter the Great in 1724 and was led by Vitus Bering. Afield from 1725 to 1731, it was Russia's first naval scientific expedition. It confirmed the presence of a strait (now known as Bering Strait) between Asia and America and was followed in 1732 by the Second Kamchatka Expedition.

The expedition spent the first two years, from January 1725 to January 1727, traveling from Saint Petersburg to Okhotsk, using horses, dog sleds and river boats. After wintering in Okhotsk it moved to the mouth of the Kamchatka River on the east coast of the peninsula. In July–August 1728 it sailed north and then north-east along the shore, exploring Karaginsky Gulf, Kresta Bay, Providence Bay, Gulf of Anadyr, Cape Chukotsky, and St. Lawrence Island.

Siberian Yupiks, or Yuits (Russian: Юиты), are a Yupik people who reside along the coast of the Chukchi Peninsula in the far northeast of the Russian Federation and on St. Lawrence Island in Alaska. They speak Central Siberian Yupik (also known as Yuit), a Yupik language of the Eskimo–Aleut family of languages.

They are also known as Siberian or Eskimo (Russian: эскимосы). The name Yuit (юит, plural: юиты) was officially assigned to them in 1931, at the brief time of the campaign of support of Indigenous cultures in the Soviet Union. Their self-designation is Yupighyt (йупигыт) meaning "true people".

The Yupik (/ˈjuːpɪk/; Russian: Юпикские народы) are a group of Indigenous or Aboriginal peoples of western, southwestern, and southcentral Alaska and the Russian Far East. They are related to the Inuit and Iñupiat. Yupik peoples include the following:

• Alutiiq, or Sugpiaq, of the Alaska Peninsula and coastal and island areas of southcentral Alaska.
• Yupʼik or Central Alaskan Yupʼik of the Yukon–Kuskokwim Delta, the Kuskokwim River, and along the northern coast of Bristol Bay as far east as Nushagak Bay and the northern Alaska Peninsula at Naknek River and Egegik Bay in Alaska.
• Siberian Yupik, including Naukan, Chaplino, and—in a linguistic capacity—the Sirenik of the Russian Far East and St. Lawrence Island in western Alaska.

Central Siberian Yupik (also known as Siberian Yupik, Bering Strait Yupik, Yuit, Yoit, "St. Lawrence Island Yupik", and in Russia "Chaplinski Yupik" or Yuk) is an endangered Yupik language spoken by the Indigenous Siberian Yupik people along the coast of Chukotka in the Russian Far East and in the villages of Savoonga and Gambell on St. Lawrence Island. The language is part of the Eskimo–Aleut language family.

In the United States, the Alaska Native Language Center identified about 400–750 Yupigestun speakers, considering "dormant speakers" who understand but cannot converse. In Russia in 2021, 172 people indicated that they speak the language, while only 92 of them use it in everyday life. Thus, the total number of speakers is no more than 550–900 people.