Bikorn Lake (, ) is the lake occupying most of the interior of Treklyano Island off the northeast coast of Robert Island in the South Shetland Islands, Antarctica. It extends in west-northwest to east-southeast direction and in southâÂÂnorth direction, with a surface area of , and is separated from the waters of Nelson Strait by a wide strip of land. The area was visited by early 19th century sealers.
The feature is so named because of its shape supposedly resembling a bicorne hat ('bikorn' in Bulgarian).
Bikorn Lake is centred east of Ugarchin Point and west of Smirnenski Point. British mapping of the area in 1968 and Bulgarian in 2009.