The reserve protects a meeting zone of multiple ecoregions in the lower Amur, including the northernmost reach of Manchurian taiga.

It is located about 50 km downstream (east) of Komsomolsk-on-Amur, in the Komsomolsky District of Khabarovsk Krai.

The territory covers the delta of the Gorin River, which is a left tributary of the Amur, entering from the west.

The main ridge north of the Gorin runs parallel to the river for about 25 km with an average grade of 14 degrees.

This climate is characterized by high variation in temperature, both daily and seasonally; with dry winters and cool summers.

In the lower levels of the Gorin River, the forests are mostly cedar-broadleaf, while spruce and larch dominate more to the north.

From the south, the Manchu (Amur) complex finds more heat-loving plants left over from the pre-glaciation period.