The Musselshell River is a significant waterway in central Montana, originating at the confluence of its North and South Forks near Martinsdale. From there, it flows northeast for approximately 342 miles before emptying into Fort Peck Lake on the Missouri River. The river drains a watershed of about 9,000 square miles, serving as a vital lifeline for the region's farms, ranches, and communities.

Paddling opportunities on the Musselshell are diverse but generally suited for intermediate to advanced paddlers due to variable water levels and occasional obstacles. The river can be divided into three main sections: the Upper Musselshell from Martinsdale to Harlowton, the Middle Musselshell from Harlowton to Roundup, and the Lower Musselshell from Roundup to Fort Peck Lake. The difficulty ranges from flatwater to Class II, with most challenging conditions typically occurring during spring runoff.

Late spring through early summer usually offers the best paddling conditions, though water levels can fluctuate significantly based on snowmelt and rainfall. Autumn can also provide pleasant paddling, but water levels may be low.

The Musselshell's ecosystem supports a variety of wildlife, including deer, antelope, and numerous bird species. The river corridor is home to cottonwood galleries and native prairie vegetation. Fish species vary along the river's course, with brown trout dominating the upper reaches, transitioning to warmwater species like smallmouth bass and walleye in the lower sections.

Key access points include Martinsdale, Harlowton, Roundup, and Mosby. The river passes through a landscape of rolling hills, badlands, and agricultural plains, offering scenic views of central Montana's countryside.

Historically, the Musselshell served as a transportation route for Native American tribes and later for early settlers. Today, it plays a crucial role in irrigation and supports recreational activities.

Safety considerations include checking current water levels, being prepared for remote stretches with limited services, and watching for obstacles such as log jams or fences. Regulations regarding fishing and river access should be reviewed before trips.

Multi-day trips are possible, particularly on the lower sections, but require careful planning due to limited developed campsites and long distances between access points. The Musselshell offers a unique, less-crowded alternative to Montana's more famous rivers, providing solitude and a true taste of the state's central region.