What the night sky looks like over Sleepy Hollow, NY
Sleepy Hollow reads as rural on this dataset's scale. Little local light dome. Most stars are visible; the Milky Way is faint but often findable away from town lights. That's brighter than 5.9% of the 3,206 US cities in this dataset.
The number comes from orbit, not a stargazer's logbook, so treat it as an estimate of sky glow rather than a certified Bortle class.
The nearest darker sky to Sleepy Hollow
The closest place in this dataset with a meaningfully darker sky is Ringwood, NJ, roughly 21 miles away in a straight line, rated dark sky. Road distance will be more.
Ringwood, NJ is itself still a measured city, not a designated dark-sky park, this only compares against the 3,206 places this dataset covers.
Sleepy Hollow against the rest of the dataset
Sleepy Hollow, NY has a population of about 11,427, one of 3,206 US cities of 10,000 or more residents in this dataset. Among all 3,206 cities here, Sleepy Hollow ranks 189 from darkest to brightest, 1 being the darkest measured.