Four Square Mile.
The definitive guide to dark skies and celestial observation in Four Square Mile, CO. Verified using National Park Service and NASA Night Sky Network Clubs data.
Quick Guide for Four Square Mile
- Top Community Pick: Chamberlin Observatory (~3.5 miles)
- Best Scientific Reading: Bortle 6.0 at Coyote Ridge
- Local Experts: Denver Astronomical Society
- Verified Observations: 5 distinct spots
If you’re looking to escape the light pollution of Four Square Mile, you’re in luck. While enthusiasts often gather at Chamberlin Observatory for its accessibility, scientific audits conducted by the National Park Service at Coyote Ridge provide the most accurate reading of the regional sky quality, measuring at a Bortle 6.0. Atmospheric stability in the Four Square Mile region is often influenced by local topography, which can help settle the air for high-magnification viewing.
The Best Times for Stargazing in Four Square Mile
Since Four Square Mile sits in a transitional light zone, viewing is best during the New Moon or after midnight when some commercial lighting is reduced.
Expert Tips for Four Square Mile Observers
Because Chamberlin Observatory is a developed site, it often features established viewing pads and specialized equipment. For the best views the site, try to observe targets when they are highest in the sky to minimize atmospheric interference. Local enthusiasts often frequent this spot, making it a great place to meet experienced observers. Regardless of your gear, allow 30 minutes for your eyes to fully dark-adapt.
Colorado Guide
Local Top Spots
Community-vetted locations known for clear horizons and accessibility for telescopes and astrophotography.
Chamberlin Observatory
" Standard Advice: Dress in layers as temperatures drop quickly after sunset. Use a red-light flashlight to preserve your night vision. "
Castlewood Canyon State Park
" Standard Advice: Dress in layers as temperatures drop quickly after sunset. Use a red-light flashlight to preserve your night vision. "
Mueller State Park
" Standard Advice: Dress in layers as temperatures drop quickly after sunset. Use a red-light flashlight to preserve your night vision. "
Horsetooth Mtn Open Space
" 'Dress for temperatures ~20F colder than forecast low for the night. If you need a flashlight, please cover it with red cellophane.' "
Cheyenne Mountain State Park
" Standard Advice: Dress in layers as temperatures drop quickly after sunset. Use a red-light flashlight to preserve your night vision. "
NPS Sky Measurements
Instrumented readings from the National Park Service Night Sky Program, providing the most accurate SQM and Bortle classifications.
Coyote Ridge
Fort Collins Natural Area
"Resolution Testing. 3 data sets collected in order to determine vertical and horizontal illuminance"
Coyote Ridge Parking
Fort Collins Natural Area
"Sky quality measurements were recorded at Coyote Ridge Parking in Fort Collins Natural Area on 1/18/2017. The site demonstrated a scientific darkness reading of 20.02 SQM."
International Dark Sky Parks
Premier locations certified for their exceptional dark sky quality and commitment to light pollution mitigation.
Florissant Fossil Beds National Monument
Florissant Fossil Beds National Monument is a 2,427-hectare IUCN Category V (International Union for Conservation of Nature) area in Colorado, U.S.
Town of Breckenridge, Colorado
The Town of Breckenridge sits at 9,603 feet above sea level in Colorado’s Rocky Mountains, just west of the Continental Divide…
Local Astronomy Clubs
Connect with experts and fellow enthusiasts through local astronomical societies and community groups.