Beloy Lake, Altai Krai, Protected lake in Altai Krai, Russia.

Beloy Lake is a protected lake and natural monument in Altai Krai, located in the southern part of Western Siberia, Russia. It sits in a flat to gently rolling landscape where open plains meet low ridges, with reeds and natural vegetation along much of its shoreline.

Russian settlers reached the Altai region in the late 1600s and gradually built communities near lakes like this one. The lake's protected status was established during the Soviet period, when natural water bodies across Siberia were formally registered and managed.

The name Beloy comes from the Russian word for "white," likely referring to how the water looks under bright daylight. Local fishermen have worked this lake for generations and still follow traditional methods within the rules of the protected area.

The lake is most comfortable to visit in summer, when paths around the shore are in good condition and the weather is more stable. Because it is a protected area, visitors should follow the signs on site, which may restrict access to certain zones or regulate behavior near sensitive areas.

Although the lake is listed as a natural monument, it also functions as an active research site where scientists track changes in Siberian freshwater ecosystems over long periods. This kind of long-term monitoring is uncommon in the region, making it a reference point for environmental researchers.