GLOBAL COLLABORATIVE OBSERVATORY NETWORK

Community & Dark Sky Reserves.

Discover verified dark-sky campsites with Bortle measurements, swap tested telescope optical train presets, and coordinate multi-rig deep sky sessions with astronomers across the globe.

Pennsylvania, USABORTLE 2 (SQM 21.8)

Cherry Springs State Park

The premier dark-sky park in the northeastern US. Strict no-white-light enforcement.

FIELD FEATURES:

✓ Dedicated Astronomy Field✓ AC Power Posts✓ 360° Horizon✓ Red Light Only Rules

Texas, USABORTLE 1 (SQM 21.98)

Big Bend Ranch State Park

Darkest sky territory in the lower 48 states. True Bortle 1 with horizon-to-horizon zodiacal light.

FIELD FEATURES:

✓ Zero Light Domes✓ Ultra-Low Humidity✓ High Transparency✓ Primitive Camping

West Virginia, USABORTLE 2 (SQM 21.75)

Spruce Knob Observation Point

Exceptional seeing conditions above valley fog. Pack warm clothing even during summer months.

FIELD FEATURES:

✓ Highest Peak in Allegheny✓ Above Mountain Mist✓ High Elevation Seeing