Bortle 3 sites in the U.S.

List of Class 3 Bortle parks and places in the U.S. for stargazing, astrophotography, star parties, and club events. Often these are national and state parks and forests that are remote or "protected" against light pollution.

A Bortle value represents the potential of a location, not what it will be when you are there. Local factors such as dust, wildfire smoke, haze, humidity, clouds, or atmospheric turbulence can diminish the Bortle value that night.

The IDA column indicates if a site is an IDA-certified sanctuary, reserve, or park. Also use your local astronomy club for guidance as they will know the darkest places near you.

Blue Springs State Park Alabama
Chattahoochee State Park Alabama
Paul Grist State Park Alabama
Everglades National Park Florida
Hamburg State Park Georgia
Kolomoki Mounds State Park Georgia
Moccasin Creek State Park Georgia
Providence Canyon State Park Georgia
Seminole State Park Georgia
Anderson Lake State Forest Illinois
Apple River Canyon State Park Illinois
Jim Edgar Panther Creek Illinois
Sam Dale Lake Illinois
Siloam Springs State Park Illinois
Lake Darling State Park Iowa
Lake of Three Fires State Park Iowa
Lake Wapello State Park Iowa
Loess Hills State Forest Iowa
Moore-Gosch Memorial Park Iowa
Okamanpedan State Park Iowa
Prairie Rose State Park Iowa
Preparation Canyon State Park Iowa
Rock Creek State Park Iowa
Springbrook State Park Iowa
Stephens State Forest Iowa
Yellow River State Forest Iowa
Buckhorn Lake State Park Kentucky
Daniel Boone National Forest Kentucky
Catahoula Lake Louisiana
Chemin-A-Haut State Park Louisiana
Cypremort Point State Park Louisiana
Lake Fausse Pointe State Park Louisiana
North Toledo Bend State Park Louisiana
Palmetto Island State Park Louisiana
South Toledo Bend State Park Louisiana
Point Lookout State Park Maryland
Wolf Den Run State Park Maryland
Kenneth Dubuque State Forest Massachusetts
Lake Dennison Massachusetts
Mohawk Trail State Forest Massachusetts
Bienville National Forest Mississippi
Clark Creek Natural Area Mississippi
Holmes County State Park Mississippi
Homochitto National Forest Mississippi
Leroy Percy State Park Mississippi
Tishomingo State Park Mississippi
Chadron State Park Nebraska
Fort Robinson State Park Nebraska
Indian Cave State Park Nebraska
Allegany State Park New York
Bowman Lake State Park New York
Camp Hero State Park New York
Cedar Island State Park New York
Davis State Park New York
Gilbert Lake State Park New York
Glimmerglass State Park New York
Highly Flow State Park New York
Krig Point State Park New York
Long Point State Park New York
Max V. Shaul State Park New York
Montauk Point State Park New York
Oquaga Creek State Park New York
Pixley Falls State Park New York
Robert G. Wehle State Park New York
Southwick Beach State Park New York
Whetstone Gulf State Park New York
Nantahala National Forest North Carolina
New River North Carolina
Pettigrew North Carolina
Cross Ranch State Park North Dakota
Fort Ransom State Park North Dakota
Lake Sakakawea State Park North Dakota
Pembina Gorge State Recreation Area North Dakota
Theodore Roosevelt National Park North Dakota
Geauga State Park Ohio
Jackson Lake State Park Ohio
Jesse Owens State Park Ohio
Lake Hope State Park Ohio
Beavers Bend State Park Oklahoma
Foss State Park Oklahoma
Great Plains State Park Oklahoma
Little Sahara State Park Oklahoma
Osage Hills State Park Oklahoma
Quartz Mountain State Park Oklahoma
Robbers Cave State Park Oklahoma
Roman Nose State Park Oklahoma
Salt Plains State Park Oklahoma
Black Moshannon State Park Pennsylvania
Chapman State Park Pennsylvania
Clear Creek State Park Pennsylvania
Cook Forest State Park Pennsylvania
Elk State Park Pennsylvania
Kinzua Bridge State Park Pennsylvania
Little Pine State Park Pennsylvania
McCalls Dam State Park Pennsylvania
Mount Pisgah State Park Pennsylvania
Parker Dam State Park Pennsylvania
Poe Paddy State Park Pennsylvania
Poe Valley State Park Pennsylvania
Raymond Winter State Park Pennsylvania
Simon Elliot State Park Pennsylvania
Trough Creek State Park Pennsylvania
Upper Pine Bottom State Park Pennsylvania
Worlds End State Park Pennsylvania
Battle of Rivers Bridge South Carolina
Francis Marion National Forest South Carolina
Hampton Plantation South Carolina
Big Hill Pond State Park Tennessee
Great Smoky Mountains National Park Tennessee
Mousetail Landing State Park Tennessee
Sgt. Alvin York State Park Tennessee
Balmorhea State Park State Park Texas
Enchanted Rock State Natural Area Texas
South Llano River State Park Texas
Douthat State Park Virginia
Grayson Highlands State Park Virginia
Holliday Lake State Park Virginia
Natural Bridge State Park Virginia
Blackwater Falls State Park West Virginia
Chippewa Moraine State Recreation Area Wisconsin
Copper Falls State Park Wisconsin
Governor Thompson State Park Wisconsin
Whitefish Dunes State Park Wisconsin
Wildcat Mountain State Park Wisconsin
Yellowstone Lake State Park Wisconsin

NP = national park | SP = state park | NF = national forest | SF = state forest | NWR = national wildlife reserve | SRA = state recreational area

U.S. nighttime lights satellite map

US night lights satellite image

2019 satellite image showing US light pollution. See full interactive map at Blue Marble Navigator.

U.S. light pollution map

US light pollution map

2015 map showing US light pollution based on Bortle scale/SQM data. See full interactive map at