Upper Missouri National Wild and Scenic River

Upper Missouri National Wild and Scenic River
Name	Upper Missouri National Wild and Scenic River
Location	Montana, United States
Nearest city	Fort Benton, Montana
Area	14919acre
Established	1976
Governing body	National Park Service

Upper Missouri National Wild and Scenic River is a federally designated corridor preserving a free-flowing section of the Missouri River through central Montana that was established under the Wild and Scenic Rivers Act in 1976. The designation protects an extensive mix of riverine, riparian, prairie, and badlands landscapes around historic landmarks such as Gates of the Mountains and Fort Benton, Montana, and recognizes connections to exploration, transportation, and Indigenous histories including Lewis and Clark Expedition and the Mandan people. Management involves federal, state, Tribal, and local partners including the National Park Service and Bureau of Land Management.

Overview

The designated corridor extends along the Missouri River from Fort Benton, Montana downstream to the eastern edge of Capital — incorporating units administered by the National Park Service and the Bureau of Land Management. The river segment commemorates the 1804–1806 Lewis and Clark Expedition route, and contains archeological sites tied to the Sioux and Crow people as well as fur trade era posts affiliated with the American Fur Company. Visitor interpretation often highlights connections to the Louisiana Purchase and the 19th-century steamboat era linked to Missouri River commerce and Fort Union Trading Post National Historic Site.

Geography and Hydrology

The river corridor flows through physiographic provinces including the Northern Great Plains and the Rocky Mountain Front, cutting through volcanic and sedimentary formations such as the Hell Creek Formation and the Bentonite layers exposed at Gates of the Mountains. Principal tributaries within the corridor include the Marias River and the Judith River, with hydrology influenced by snowmelt from the Rocky Mountains and precipitation patterns across Montana. River morphology features braided and meandering reaches, oxbow cutoffs, and alluvial benches that create diverse fluvial habitats described in hydrologic studies conducted by the United States Geological Survey.

Natural and Cultural History

The corridor preserves stratified archaeological sites documenting millennia of Indigenous occupation by groups including the Assiniboine, Blackfeet Nation, and Apsáalooke (Crow). Euro-American contact layers include fur trade routes associated with the Hudson's Bay Company and the American Fur Company, military expeditions such as Fort Benton supply lines, and the imprint of the Lewis and Clark Expedition journals and maps. Paleontological exposures in adjacent badlands have yielded fossils contemporary with research at institutions such as the Smithsonian Institution and Museum of the Rockies. Historic structures and interpretive trails link to themes in American West expansion, steamboat navigation, and the Homestead Act era.

Ecology and Wildlife

Riparian corridors along the river support assemblages of hardwoods and shrubs including riverine cottonwood galleries that provide nesting for colonial birds recorded by the Audubon Society and surveys by the Montana Fish, Wildlife & Parks. Mammalian species observed include American bison (historical and reintroduction efforts), elk, pronghorn, white-tailed deer, and predatory species such as gray wolf and cougar documented in regional recovery plans coordinated with the U.S. Fish and Wildlife Service. Aquatic communities host native and nonnative fishes including pallid sturgeon and walleye, with conservation concern for species listed under the Endangered Species Act and monitoring by the United States Fish and Wildlife Service.

Recreation and Access

Recreational uses emphasize non-motorized and low-impact activities promoted by the National Park Service and local visitor bureaus: water-based paddling and canoeing along historic routes mapped from the Lewis and Clark National Historic Trail, sport fishing regulated by Montana Fish, Wildlife & Parks, wildlife viewing, and backcountry camping on BLM-administered benches. Access points near Fort Benton, Montana, river outfitters in Great Falls, Montana, and interpretive facilities at Gates of the Mountains provide logistical support. Seasonal navigation conditions reflect snowmelt-runoff timing and reservoir releases from upstream projects such as Fort Peck Dam and Garrison Dam which influence downstream flows.

Management and Protection

Management partnerships include the National Park Service, Bureau of Land Management, Montana Fish, Wildlife & Parks, and Tribal governments including the Crow Tribe and Blackfeet Nation. The corridor is governed by the statutory framework of the Wild and Scenic Rivers Act and supplemented by resource plans, river management plans, and cooperative agreements that address cultural resource protection under laws such as the National Historic Preservation Act. Monitoring programs involve the United States Geological Survey for hydrology, the U.S. Fish and Wildlife Service for endangered species, and state wildlife agencies for game management.

Threats and Conservation Efforts

Threats include altered flow regimes driven by upstream reservoirs linked to projects administered by the U.S. Army Corps of Engineers and Bureau of Reclamation, invasive species pathways tracked by the National Invasive Species Council, energy development proposals tied to regional permitting by Bureau of Land Management and Montana Department of Environmental Quality, and climate-driven shifts highlighted in assessments by the Intergovernmental Panel on Climate Change. Conservation efforts draw on multi-party initiatives such as river corridor conservation easements, habitat restoration supported by the Natural Resources Conservation Service, species recovery actions under the Endangered Species Act, and cultural site stewardship coordinated with Tribal historic preservation offices and the National Trust for Historic Preservation.

Category:Rivers of Montana Category:Protected areas of Montana