The Jocko River is a roughly 40 miles (64.4 km) tributary of the Flathead River

Flathead River

The Flathead River, in the northwestern part of the U.S. state of Montana, originates in the Rocky Mountains near Glacier National Park and flows southwest into Flathead Lake, then after a journey of , empties into the Clark Fork. The river is part of the Columbia River drainage basin, as the Clark...

 in western Montana

Montana

Montana is a state in the Western United States. The western third of Montana contains numerous mountain ranges. Smaller, "island ranges" are found in the central third of the state, for a total of 77 named ranges of the Rocky Mountains. This geographical fact is reflected in the state's name,...

 in the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

. It rises in the foothills of the Rocky Mountains

Rocky Mountains

The Rocky Mountains are a major mountain range in western North America. The Rocky Mountains stretch more than from the northernmost part of British Columbia, in western Canada, to New Mexico, in the southwestern United States...

 and flows west into the Flathead at Dixon

Dixon, Montana

Dixon is a census-designated place in Sanders County, Montana, United States. The population was 216 at the 2000 census.-Geography:Dixon is located at ....

. The elevation is 2503 feet (762.9 m) where it joins the Flathead. It is also known as Jacques Fork, Jim’s Fork, Prune River or Wild Horse Creek. The river breaks into three forks, a North, Middle and South Forks, of which the Middle Fork is considered the main stem.