The Musselshell River is a

tributary A tributary, or affluent, is a stream or river that flows into a larger stream or main stem (or parent) river or a lake. A tributary does not flow directly into a sea or ocean. Tributaries and the main stem river drain the surrounding drai ...

of the Missouri River, long from its origins at the confluence of its North and South Forks near Martinsdale, Montana to its mouth on the Missouri River. It is located east of the Continental divide entirely within

Montana Montana () is a state in the Mountain West division of the Western United States. It is bordered by Idaho to the west, North Dakota and South Dakota to the east, Wyoming to the south, and the Canadian provinces of Alberta, British Columb ...

in the

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territori ...

. Counting its pre-confluence tributaries, it measures in length. It rises in several forks in the Crazy,

Little Belt The Little Belt (, ) is a strait between the island of Funen and the Jutland Peninsula in Denmark. It is one of the three Danish Straits that drain and connect the Baltic Sea to the Kattegat strait, which drains west to the North Sea and Atla ...

, and Castle mountains in central Montana. The main branch is formed by the confluence of the North Fork and South Fork in Meagher County, about east of White Sulphur Springs, Montana, just east of Martinsdale, north of Martinsdale Reservoir, and just west of Meagher County's border with Wheatland County. The North Fork flows south from the Little Belt Mountains through Bair Reservoir, then southeast. The South Fork flows northeast from the Crazy Mountains. From the confluence of these two waterways, the main branch flows roughly due east past Two Dot,

Harlowton Harlowton is a city in and the county seat of Wheatland County, Montana, United States. The population was 955 at the 2020 census. Description The city was once the eastern terminus of electric operations (1914–74) for the "Pacific Extension ...

, and Roundup, then turns north just past Melstone, and continues to the UL Bend on the Missouri River at the beginning of Fort Peck Reservoir. The Musselshell River has also been known as: Cockkleshell River, Mahtush-ahzhah, Muscleshell River, Mustleshell River, Shell River. The Musselshell was entered by the

Lewis and Clark Expedition The Lewis and Clark Expedition, also known as the Corps of Discovery Expedition, was the United States expedition to cross the newly acquired western portion of the country after the Louisiana Purchase. The Corps of Discovery was a select gr ...

on May 20, 1805 and named by them for the freshwater mussels lining the bank, noting in their journals that the Minnetare people had given the waterway a similar name. The

Blackfeet The Blackfeet Nation ( bla, Aamsskáápipikani, script=Latn, ), officially named the Blackfeet Tribe of the Blackfeet Indian Reservation of Montana, is a federally recognized tribe of Siksikaitsitapi people with an Indian reservation in Mon ...

, who hunted buffalo and prepared the meat for winter in the Musselshell area, called it the Dried Meat River.

Geography

The terrain varies from the mountainous

island range An island range is a mountain range that exists in total or almost total isolation from a larger chain of ranges and sub-ranges. From a distance on the plains, these ranges appear as "islands" of higher ground. They are often described as islands of ...

s where it originates to prairie. It is fed largely by snowmelt and has its highest flow rates in the spring and early summer. The Musselshell River Basin, including tributaries, drains . The South Fork has much brush, gravel bars, and clear water. The North Fork has

willow Willows, also called sallows and osiers, from the genus ''Salix'', comprise around 400 speciesMabberley, D.J. 1997. The Plant Book, Cambridge University Press #2: Cambridge. of typically deciduous trees and shrubs, found primarily on moist so ...

trees and undercut banks. The Musselshell is about wide at its confluence of the two forks. Three reservoirs built in the 1930s help control the river's flow: Bair Reservoir on the North Fork, Martinsdale Reservoir near the confluence, and Deadman's Basin on the main river between Shawmut and Ryegate. The river becomes wider in the before Roundup.

Honeysuckle Honeysuckles are arching shrubs or twining vines in the genus ''Lonicera'' () of the family Caprifoliaceae, native to northern latitudes in North America and Eurasia. Approximately 180 species of honeysuckle have been identified in both conti ...

, wild rose, willow, and cottonwood are common in this section. The river is about wide in its last , with increased choppiness and flow rate. The relatively more arid climate in this section results in less vegetation, more livestock grazing, and poorer soil. Additional tributaries of the Musselshell include: Middle Fork, Bozeman Fork, Dry Fork, American Creek Fork, Big Elk Creek, Careless Creek, Cottonwood Creek, Flat Willow Creek, Hopley Creek, Spring Creek, Swimming Woman Creek, and Willow Creek.

Usage

Recreational use of the Musselshell averages 63,000 visitor-days per year. Much of the water on the Musselshell is decreed water and managed by the Musselshell River Distribution Project. The Musselshell is used extensively for

irrigation Irrigation (also referred to as watering) is the practice of applying controlled amounts of water to land to help grow crops, landscape plants, and lawns. Irrigation has been a key aspect of agriculture for over 5,000 years and has been devel ...

for farming and ranching and due to that may run dry or nearly dry in many sections during much of the summer and fall. Water supply is less in the lower basin due to the more arid climate and the fact that users in the upper basin have senior rights to the water. Fishing is popular along most parts of the Musselshell. Species of fish found on the North and/or South Forks down to Harlowton include:

mountain whitefish The mountain whitefish (''Prosopium williamsoni'') is one of the most widely distributed salmonid fish of western North America. It is found from the Mackenzie River drainage in Northwest Territories, Canada south through western Canada and ...

, and

brown Brown is a color. It can be considered a composite color, but it is mainly a darker shade of orange. In the CMYK color model used in printing or painting, brown is usually made by combining the colors orange and black. In the RGB color model us ...

, cutthroat,

rainbow A rainbow is a meteorological phenomenon that is caused by reflection, refraction and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky. It takes the form of a multicoloured circular arc. Rainbows c ...

, and brook trout. The eastern part of the river has channel catfish,

sauger The sauger (''Sander canadensis'') is a freshwater perciform fish of the family Percidae that resembles its close relative, the walleye. The species is a member of the largest vertebrate order, the Perciformes.Jaeger, Matthew. 2004. Montana's ...

, smallmouth bass, and

walleye The walleye (''Sander vitreus'', synonym ''Stizostedion vitreum''), also called the yellow pike or yellow pickerel, is a freshwater perciform fish native to most of Canada and to the Northern United States. It is a North American close relat ...

due to the warmer water caused by dewatering from irrigation and the arid climate shift from mountain to prairie ecosystems in the Musselshell's last . There are three different species of freshwater mussels as well as

crawdads Crayfish are freshwater crustaceans belonging to the clade Astacidea, which also contains lobsters. In some locations, they are also known as crawfish, craydids, crawdaddies, crawdads, freshwater lobsters, mountain lobsters, rock lobsters, m ...

. The Gordon Butte Pumped Storage Project is a planned pumped hydroelectric power plant that will use water from the Cottonwood Creek, a Musselshell tributary.

Spring 2011 flood

There was major flooding on the Musselshell River in May 2011. On May 26 the flooding inundated portions of Roundup. Cresting and flow rate records were set along several sections of the river, such as Mosby and Shawmut, near

. The crest of the flood at , more than over flood state, exceeded the record previously set in 1975.

Legacy

The Musselshell region is where the last surviving herds of wild

American buffalo American Buffalo may refer to: *American Buffalo (play), ''American Buffalo'' (play), a play by David Mamet *American Buffalo (film), ''American Buffalo'' (film), a 1996 film of Mamet's play directed by Michael Corrente *American Buffalo (coin), a ...

lived. Zoologist

William Temple Hornaday William Temple Hornaday, Sc.D. (December 1, 1854 – March 6, 1937) was an American zoologist, conservationist, taxidermist, and author. He served as the first director of the New York Zoological Park, known today as the Bronx Zoo, and h ...

of the

Smithsonian Institution The Smithsonian Institution ( ), or simply the Smithsonian, is a group of museums and education and research centers, the largest such complex in the world, created by the U.S. government "for the increase and diffusion of knowledge". Founded ...

harvested specimens from the region in 1886 so that future generations would know what the buffalo looked like. The Musselshell was mentioned by both Del Gue and Jeremiah Johnson in the film '' Jeremiah Johnson''. The Musselshell is also mentioned in

Larry McMurtry Larry Jeff McMurtry (June 3, 1936March 25, 2021) was an American novelist, essayist, bookseller and screenwriter whose work was predominantly set in either the Old West or contemporary Texas.

's classic 1985 novel ''

Lonesome Dove ''Lonesome Dove'' is a 1985 Western novel by American writer Larry McMurtry. It is the first published book of the ''Lonesome Dove'' series, but the third installment in the series chronologically. The story revolves around the relationships b ...

''. Roundup is home to the Musselshell Valley Historical Museum, which documents the region's history.

Notes

External links