The western half of the park is on a low-lying eastern extension of the Sredneamurskaya plain. This plain is a flat, boggy depression between the Sikhote-Aline ridge to the east and the Lesser Khingan mountains to the west. These are the alluvial lowlands of the Amur River floodplain, down to 40 meters in altitude. The southeastern wing of the park is the valley of the Pihtsy river, and is relatively flat. The northeastern wing is the valley of the Anyuy River and its tributaries, and it has steeper and deeper canyons, and an average altitude of 600 meters. The ultimate headwaters of the Anyuy is Tordoki Yani, the highest peak in the Sikhote-Alin.