In Eurasia distributed in NE Siberia, from Lena River, Verhoyanskoe and Kolymskoe Highlands, Chukotka, and Kamchatka. From Kolyma River to Arctic and Pacific Oceans; in south range does not reach Magadan (Gromov and Erbaeva, 1995). According to Serdyuk (1986) current area of occupancy is above 2 million sq. km, but it distributed sporadically and inhabited zones interchange with wide uninhabited places. There is a big isolated population at western border of the range, in Lena River Basin (Panteleev, 1998). In Yakutia here are two isolated populations: on Yana River, and on headstream of Indigirka River (Vinokurov et al., 1982). The range is expanding (Serdyuk, 1986).

In North America, from Alaska east to west of Hudson Bay and south to central British Columbia and extreme northern Manitoba.