The
Shelon is a
river in the northwest part of
European Russia, in
Dedovichsky,
Porkhovsky, and
Dnovsky Districts of
Pskov Oblast and
Soletsky and
Shimsky Districts of
Novgorod Oblast. The Shelon is one of the principal tributaries of
Lake Ilmen. It has a length of and drains a basin of . The towns of
Porkhov and
Soltsy, as well as urban-type settlements of
Dedovichi and
Shimsk, are located on the banks of the Shelon River. The principal tributaries of the Shelon are the
Sudoma (left), the Belka (right), the Polonka (right), the Uza (left), the Udokha (left), the Sitnya (left), and the Mshaga (left).