Due to construction, oversized vehicles will not be allowed to park in the visitor center parking lot due to lack of space and ability to turn-around safely. There is oversized parking along the main park road. More
Starting April 28, 2025, the park will be closed Monday through Thursday
Starting April 28, 2025, the park will be closed Monday through Thursday to ensure the safety of visitors during construction projects. Open Friday, Saturday, and Sunday. Visitors can expect this closure to last through the 2025 summer season. More
Little Bighorn Battlefield National Monument is part of the Rocky Mountain Network (ROMN) of the National Park Service (NPS) Inventory and Monitoring Program and is classified as Class I.
Class I air quality areas receive the highest protection under the Clean Air Act. Even though Little Bighorn Battlefield is a distance from cities and pollution sources it is still vulnerable to poor air quality from pollutants such as ozone, nitrogen oxides, sulfur dioxide, and toxins. These air pollutants affect, or have the potential to affect, air quality and natural resources including vegetation, wildlife, soils, water quality, and visibility.
Air pollution sources come from a variety of sources. Mobile sources (cars, trucks, off-road vehicles), stationary sources (power plants, and industry), and area sources (agriculture, fires, and road dust).
Air Quality Information on Parks in the Rocky Mountain Network
Locations:Acadia National Park, Allegheny Portage Railroad National Historic Site, Amistad National Recreation Area, Apostle Islands National Lakeshore, Appalachian National Scenic Trail, Appomattox Court House National Historical Park, Arches National Park, Assateague Island National Seashore, Big Bend National Park, Big Cypress National Preserve, Big Thicket National Preserve, Biscayne National Park, Boston Harbor Islands National Recreation Area, Buffalo National River, Cape Cod National Seashore, Capitol Reef National Park, Carl Sandburg Home National Historic Site, Carlsbad Caverns National Park, Channel Islands National Park, Chattahoochee River National Recreation Area, Chickasaw National Recreation Area, City Of Rocks National Reserve, Colorado National Monument, Congaree National Park, Crater Lake National Park, Craters Of The Moon National Monument & Preserve, Cumberland Island National Seashore, Cuyahoga Valley National Park, Delaware Water Gap National Recreation Area, Denali National Park & Preserve, Devils Tower National Monument, Dinosaur National Monument, Everglades National Park, Fort Larned National Historic Site, Gateway National Recreation Area, Glacier National Park, Glacier Bay National Park & Preserve, Glen Canyon National Recreation Area, Golden Gate National Recreation Area, Grand Canyon National Park, Grand Portage National Monument, Grand Teton National Park, Great Basin National Park, Great Sand Dunes National Park & Preserve, Great Smoky Mountains National Park, Gulf Islands National Seashore, Hawaiʻi Volcanoes National Park, Home Of Franklin D Roosevelt National Historic Site, Homestead National Historical Park, Horseshoe Bend National Military Park, Hot Springs National Park, Indiana Dunes National Park, Isle Royale National Park, Jean Lafitte National Historical Park and Preserve, John Day Fossil Beds National Monument, Joshua Tree National Park, Katahdin Woods and Waters National Monument, Katmai National Park & Preserve, Kenilworth Park & Aquatic Gardens, Klondike Gold Rush National Historical Park, Knife River Indian Villages National Historic Site, Lake Clark National Park & Preserve, Lake Roosevelt National Recreation Area, Lassen Volcanic National Park, Lewis and Clark National Historical Park, Lowell National Historical Park, Mammoth Cave National Park, Marsh - Billings - Rockefeller National Historical Park, Minute Man National Historical Park, Mississippi National River & Recreation Area, Monocacy National Battlefield, Montezuma Castle National Monument, Mount Rainier National Park, Natchez Trace Parkway, Natchez Trace National Scenic Trail, New River Gorge National Park & Preserve, Niobrara National Scenic River, North Cascades National Park, Ocmulgee Mounds National Historical Park, Olympic National Park, Oregon Caves National Monument & Preserve, Ozark National Scenic Riverways, Padre Island National Seashore, Petersburg National Battlefield, Pictured Rocks National Lakeshore, Pinnacles National Park, Pipestone National Monument, Prince William Forest Park, Redwood National and State Parks, Richmond National Battlefield Park, Rio Grande Wild & Scenic River, Rock Creek Park, Rocky Mountain National Park, Saguaro National Park, Saint Croix National Scenic Riverway, Saint-Gaudens National Historical Park, San Juan Island National Historical Park, Santa Monica Mountains National Recreation Area, Saugus Iron Works National Historic Site, Sequoia & Kings Canyon National Parks, Shenandoah National Park, Sleeping Bear Dunes National Lakeshore, Tallgrass Prairie National Preserve, Timucuan Ecological & Historic Preserve, Tumacácori National Historical Park, Tuzigoot National Monument, Upper Delaware Scenic & Recreational River, Valles Caldera National Preserve, Voyageurs National Park, Weir Farm National Historical Park, Wind Cave National Park, Women's Rights National Historical Park, Yellowstone National Park, Yosemite National Park, Yucca House National Monument, Zion National Parkmore »
Offices:Air Resources Division, National Natural Landmarks Program, Natural Resource Stewardship and Science Directorate
Read the abstract and get the link to a published paper on a model to predict mercury risk park waterbodies: Kotalik, C.J. et al. 2025. Ecosystem drivers of freshwater mercury bioaccumulation are context-dependent: insights from continental-scale modeling. Environmental Science & Technology. DOI: 10.1021/acs.est.4c07280
Offices:Air Resources Division, Natural Resource Stewardship and Science Directorate
Spend a day at Glacier National Park with the Montana Conservation Corps. This program inspires youth and young adults to be leaders and stewards of the land. See what it's like to do hands-on conservation work, like collecting dragonfly larvae, through the eyes of a youth corps member.
Locations:Great Sand Dunes National Park & Preserve, Rocky Mountain National Park
In this episode follow us to Rocky Mountain National Park and Great Sand Dunes National Park, two of over 50 parks participating in the Dragonfly Mercury Project.
Locations:Glacier National Park, Great Sand Dunes National Park & Preserve, Rocky Mountain National Park
Few things look more pristine than a fresh blanket of snow, yet each snowflake naturally carries small particles from the atmosphere. When snowflakes build around these particles, the resulting snowfall can bring pollutants from far away into our national parks. Long-term snow chemistry monitoring is showing some improvements in air quality at Glacier and Rocky Mountain National Parks, and Great Sand Dunes National Park and Preserve.
Air quality profile for Glacier National Park. Gives park-specific information about air quality and air pollution impacts for Glacier NP as well as the studies and monitoring conducted for Glacier NP.
Locations:Great Sand Dunes National Park & Preserve
Offices:Air Resources Division
Air quality profile for Great Sand Dunes National Park & Preserve. Gives park-specific information about air quality and air pollution impacts for Great Sand Dunes NP & Pres as well as the studies and monitoring conducted for Great Sand Dunes NP & Pres.
Air quality profile for Rocky Mountain National Park. Gives park-specific information about air quality and air pollution impacts for Rocky Mountain NP as well as the studies and monitoring conducted for Rocky Mountain NP.
Locations:Grand Teton National Park, North Cascades National Park, Rocky Mountain National Park, Yosemite National Park
After a long hike through the mountains, nothing compares to the inspiring beauty of a healthy, colorful mountain lake. But airborne nitrogen pollution threatens the health and function of these alpine oases.
