A total of seventy streams that are at least 50 miles (80 km) long flow through the U.S. state of Idaho. All of these streams originate in the United States except the Kootenai River (third-longest) and the Moyie River (thirty-first-longest), both of which begin in the Canadian province of British Columbia. At 1,076 miles (1,732 km), the Snake River is the longest and the only stream of more than 500 miles (800 km) in total length. It begins in Wyoming and flows through Idaho for 769 miles (1,238 km), and then through Oregon and Washington. Some of the other streams also cross borders between Idaho and Montana, Nevada, Oregon, Utah, Washington, or Wyoming, but the majority flow entirely within Idaho, the longest of which is the Salmon River at 425 miles (684 km).