Radok Lake is a meltwater lake about 4 miles long and marked by a slender glacier tongue feeding into it from the west, lying 3 miles south-west of Beaver Lake and 15 miles south-east of the Aramis Range, Prince Charles Mountains. Plotted by Australian National Antarctic Research Expeditions (ANARE) from air photos taken by the RAAF Antarctic Flight in 1956. Named for Uwe Radok, lecturer in meteorology at the University of Melbourne, who greatly assisted Australian National Antarctic Research Expeditions (ANARE)'s glaciological program. Radok Lake is the deepest (362 m) known lake on the Antarctic continent and the only known freshwater lake to host a floating ice tongue glacier.