Khadyn Lake, Protected saltwater lake in Tandinsky District, Russia

Khadyn Lake is a drainless lake of 23.6 km² in the Tandinsky District, at 707 m elevation, 3 km east of Dus-Khol and north of Chagytay. Its water is weakly mineralised, of chloride-sulfate-sodium composition with traces of bromine at pH 8.4. The shores are sandy, with white salt efflorescences on the eastern and northern banks, and a small Khadyn river enters from the south.

Khadyn is a drainless lake in a basin of the Tuvan depression, fed by the small Khadyn river entering from the south bank. Its weakly mineralised water is of the chloride-sulfate-sodium type with traces of bromine, pH 8.4. In the northern bays lie beds of plastic mud smelling of hydrogen sulphide, 0.4 to 0.9 m thick. A Soviet-era summer pension on the shore now stands in ruins.

The name Khadyn means "birch" in Tuvan, referring to the birch trees of the surrounding area. Local residents come here for wild camping and swimming, and each year students of Tuvan State University clear the rubbish left along the shore.

Khadyn lies 15 km west of the M-54 Yenisey highway, south of Kyzyl and 3 km east of Dus-Khol lake; the small Khadyn river enters from the south shore. Sandy beaches line the shore, with salt efflorescence on the eastern and northern banks. The Soviet-era summer pension has collapsed, so visitors bring their own shelter; mosquitoes are scarce around the lake.

The lake has no fish, and blood-sucking insects are scarce around its shores. Its northern bays hold beds of pliable mud smelling of hydrogen sulphide, 0.4 to 0.9 m thick. Students of Tuvan State University clear the rubbish each year.