From Wikipedia; please see the article if you're interested in further information.

The Taiga
The taiga, which is the world's largest forest region, contains mostly coniferous spruce, fir, pine, and larch. This is the largest natural zone of Russia, an area about the size of the United States. In the northeastern portion of this belt, long and severe winters frequently bring the world's coldest temperatures for inhabited areas. The taiga zone extends in a broad band across the middle latitudes, stretching from the Finnish border in the west to the Verkhoyansk Range in northeastern Siberia and as far south as the southern shores of Lake Baikal. Isolated sections of taiga also exist along mountain ranges such as the southern part of the Urals and in the Amur River valley bordering China in the Far East.