Itkanaahtuusu

Itkanaahtuusu is a name associated with the Powder River, which runs north from the mountains of Wyoming into Montana. Its tributaries drain the country east of the Bighorn Mountains before the river joins the Yellowstone. The river's English name refers to the dark sand along its banks, said to resemble gunpowder. Its valley crosses the open plains of the northern interior, a landscape long travelled by Indigenous peoples.