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Lake George, freshwater lake in southeastern New South Wales, Australia. It is located about 25 miles (40 km) northeast of Canberra, just east of the Lake George Range, a low ridge in the Great Dividing Range. Occupying a structural trough formed by faulting during the Miocene Epoch (i.e., about 23 to 5.3 million years ago) or a little earlier, the lake drains a 380-square-mile (984-square-km) basin between the headstreams of the Yass and Shoalhaven rivers,...