Glenwood Springs, CO Night Sky Brightness
Glenwood Springs, CO: how dark is the sky here?
Glenwood Springs's sky measures dark sky here. Among the darkest skies of any US city in this dataset. The Milky Way should be visible overhead on clear, moonless nights. Only 1.9% of the 3,206 cities measured here read darker than Glenwood Springs.
This comes from a satellite measuring light radiating upward, not a person's eyes on the ground, so it isn't the same as a Bortle class, though the two track each other closely - see the Bortle scale guide for where they can disagree.
Glenwood Springs is already about as dark as this dataset gets
Nothing in this dataset's 3,206 US cities measures a darker sky than Glenwood Springs. That doesn't mean nowhere is darker, unincorporated land and wilderness aren't part of this dataset at all, only incorporated cities of 10,000 people or more.
How Glenwood Springs compares nationally
Glenwood Springs, CO counts roughly 10,311 residents, among the 3,206 US cities this site tracks. Glenwood Springs places 63 of 3,206 cities in this dataset's darkest-to-brightest order, ranked by the method in the methodology guide.