The Snake River is located in the Yukon Territory near the Northwest Territories

Northwest Territory

The Territory Northwest of the River Ohio, more commonly known as the Northwest Territory, was an organized incorporated territory of the United States that existed from July 13, 1787, until March 1, 1803, when the southeastern portion of the territory was admitted to the Union as the state of Ohio...

 border. It is the farthest east river in the Peel watershed, a major tributary of the Mackenzie River

Mackenzie River

The Mackenzie River is the largest river system in Canada. It flows through a vast, isolated region of forest and tundra entirely within the country's Northwest Territories, although its many tributaries reach into four other Canadian provinces and territories...

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The Snake is 300 km (186 mi) in length. The headwaters of the river are located in the Werneke Mountains.

First Nations

The Snake River flows through traditional territories of the Tetlit Gwitchin and the Na-cho Ny’a’k Dun First Nations.