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The park ranges in elevation from 183 metres (600') at the Little Buffalo River to 945 metres (3,100') in the Caribou Mountains . The park headquarters is located in Fort Smith . It contains a large fresh water delta formed by the Peace, Athabasca and Slave River s.
The park contains the only natural nesting habitat for the critically endangered whooping crane. This area was designated a UNESCO World Heritage Site in 1983.