Little Bighorn River Canyon in Wyoming, the Little Bighorn receives other mountain streams as tributaries including the Dry Fork (which despite its name maintains a permanent, year-round significant flow of water into the Little Bighorn), and the West Fork of the Little Bighorn. After issuing from its canyon at the Montana-Wyoming line the Little Bighorn flows northward across the Crow Indian Reservation. The river flows past the towns of Wyola, Lodge Grass and Crow Agency, and joins the Bighorn River near the town of Hardin. At Wyola, Montana, the Little Bighorn receives the flow of Pass Creek flowing north from the Bighorn Mountains.
Bighorn Mountains of the Little Bighorn, Tongue, and Powder rivers. Bighorn Canyon National Recreation Area consists of approximately within the Bighorn Mountains. It includes Bighorn Lake, a reservoir damming the Bighorn River. In 2015, a sudden, huge 'gash' was found in Wyoming's Big Horn Mountains. The Wyoming Geological Survey studied the area and determined that "The Crack" may be the result of an "apparent active landslide" in the southern end of the Big Horn Mountains. The Bighorns are a popular destination for hiking, backpacking, fly fishing, horse back riding and increasingly ATV riding and snowmobiling. Trails wind through most of the national