Light Pollution Impact - Severe
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| Bandelier National Monument | Everglades National Park | Great Smoky Mountains National Park |
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| Joshua Tree National Park | Mammoth Cave National Park | Mesa Verde National Park |
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| Pinnacles Wilderness Area | Point Reyes Wilderness Area | Rocky Mountain National Park |
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| Shenandoah National Park | ||
Light Pollution Impact - Moderate
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| Acadia National Park | Arches National Park | Badlands National Park |
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| Black Canyon of the Gunnison National Park |
Carlsbad Caverns National Park | Glacier National Park |
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| Grand Canyon National Park | Grand Teton National Park | Isle Royale National Park |
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| Roosevelt Campobello International Park |
Sequoia National Park | Theodore Roosevelt National Park |
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| Virgin Islands National Park | Voyageurs National Park | Wind Cave National Park |
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| Yellowstone National Park | Zion National Park | |
Light Pollution Impact - Slight
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| Big Bend National Park | Bryce Canyon National Park | Canyonlands National Park |
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| Capitol Reef National Park | Chiricahua National Monument | Crater Lake National Park |
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| Craters of the Moon National Monument |
Great Sand Dunes National Park | Guadalupe Mountains National Park |
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| Kings Canyon National Park | Lassen Volcanic National Park | Petrified Forest National Park |
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| Redwood National Park | Yosemite National Park | |
As a rough estimate - around Green you loose approximately half of the visible stars and around Orange you loose three-fourths. - Robert Wagner
Key and US Forecasted Growth
These images were produced using the North American Night Sky Brightness Overlay and Google Earth.
The list of 156 Mandatory Class 1 Federal Areas is available at the EPA Website.
A map of Federal Class 1 Areas is available at the NPS Website.
This site is maintained by Robert Wagner. Please contact me if you have any additional relevant information or corrections.