Guides
Colorado Dark Sky Parks: Reported Sky Quality and How to Choose One
Four Colorado dark sky parks with their reported Bortle classes, what makes each one dark, and how to choose among them for a stargazing trip.
Topic
bortle scale
Guides
Bortle 1 Skies in the US: Five Parks That Come Close
Bortle 1 skies in the US: none of the five parks that come closest has a published class 1 rating, plus what each agency says about its sky.