Mentasta Lake is located in Alaska, connected to the Tok Cutoff from the Richardson Highway by a 6-mile spur road. The lake is situated in the traditional territory of the Ahtna Athabascan people, who have inhabited the Copper River basin for generations. The area surrounding Mentasta Lake is characterized by diverse wildlife and natural features. Dall sheep graze on nearby mountain slopes, caribou migrate through the region, and moose browse in the forested lowlands. Spruce and birch forests surround the lake, providing habitat for various plant species important to the Ahtna people's traditional way of life.

The lake holds significant historical and cultural importance. It was a key route for Native immigration across the Alaska Range, with early village settlements located at various sites around its shores. Today, the Mentasta Traditional Tribe, a federally recognized tribe, maintains a presence in the area. The lake's name comes from the Mentasta village, home to the "headwaters people" who have long been stewards of the Upper Copper River lands.

Paddlers on Mentasta Lake can expect views of Mentasta Mountain, which holds cultural significance in Ahtna traditional stories. The Slana River, which drains into the Copper River, is part of the lake's watershed and serves as a spawning ground for salmon and whitefish. These fish species have been staples of the Ahtna people's diet for centuries.

Visitors should be aware of and respect the area's cultural significance and private property. The lake's proximity to the Mentasta village and its importance to the local community mean that paddlers should practice cultural sensitivity and adhere to any local guidelines or restrictions.