The Pes is a river in Khvoyninsky District of Novgorod Oblast and in Chagodoshchensky District of Vologda Oblast in Russia. It is a right tributary of the Chagodoshcha. It is 145 kilometres (90 mi) long, and the area of its basin 2,730 square kilometres (1,050 sq mi). The principal tributary of the Pes is the Rattsa (left). The urban-type settlements of Khvoynaya and Sazonovo are located on the banks of the Pes.