Medvejie Lake is a long, narrow, snow-fed lake on Baranof Island just south of Sitka, Alaska in the Alaskan Panhandle, which drains into Silver Bay, eight miles (13 km) southeast of Sitka, on west coast of Baranof Island, Alexander Archipelago.

Little forested land exists between the mountains and shores of the lake owing to the precipitous rise of surrounding topography.

As such, the geography of the area creates a narrow natural wind tunnel making blowdowns very common inside the valley.

Medvejie Lake's outlet stream empties into Bear Cove, Silver Bay, and the Pacific Ocean.

The temperature in the Medvejie Lake valley, partly due to sunlight blocked by surrounding peaks (but also because of air cooled by snow from surrounding mountains and icefields that flows into the valley basin), is roughly five degrees colder than Sitka or the Medvejie Fish Hatchery's temperature.