Original: It originates on the slopes of Mount Kosciuszko, Australia's highest mainland peak, draining the eastern slopes of the Snowy Mountains in New South Wales, before flowing through the Snowy River National Park in Victoria and emptying into Bass Strait.
Simplified: It starts on the slopes of Mount Kosciuszko, Australia's highest mountain. It gets its water from the eastern slopes of the Snowy Mountains in New South Wales, and then flows through the Snowy River National Park in Victoria and finally into Bass Strait.