Dalstroy, also known as Far North Construction Trust, was an organization set up in 1931 in order to manage road construction and the mining of gold in the Russian Far East, including the Magadan Region, Chukotka, parts of Yakutia and parts of present-day Kamchatka Krai.

Kolyma or Kolyma Krai is a historical region in the Russian Far East that includes the basin of Kolyma River and the northern shores of the Sea of Okhotsk, as well as the Kolyma Mountains. It is bounded to the north by the East Siberian Sea and the Arctic Ocean, and by the Sea of Okhotsk to the south. Kolyma Krai was never formally defined and over time it was split among various administrative units. As of 2023, it consists roughly of the Magadan Oblast, north-eastern areas of Yakutia, and the Bilibinsky District of Chukotka Autonomous Okrug.