What river begins in Lewis and Clark County outside of Missoula, Montana?
Blackfoot River (Montana) The Blackfoot River, sometimes called the Big Blackfoot River to distinguish it from the Little Blackfoot River, is a snow-fed and spring-fed river in western Montana. The Blackfoot River begins in Lewis and Clark County at the Continental Divide, 10 miles (16 km) northeast of the town of Lincoln (4536 feet, 1382 m). The river's headwaters are between Rogers Pass (5610 ft, 1710 m) to the north and Stemple Pass (6376 ft, 1943 m) to the south. It flows westward through the town of Milltown and enters the Clark Fork River approximately five miles (8 km) east of the city of Missoula (3210 ft, 978 m).
Montana Highway 37 Montana State Highway 37 is a 67 mi state highway in the US state of Montana. It begins in downtown Libby, Montana and takes a meandering course northeastwards upstream along the Kootenai River and the eastern shore of Lake Koocanusa before terminating at U.S. Route 93 a few miles north of Eureka, Montana.