Gretna, LA: how dark is the sky here?

Gretna reads as urban on this dataset's scale. Sky glow overhead most nights. Typically only planets, the Moon, and a handful of the brightest stars are visible. That's brighter than 97.5% of the 3,206 US cities in this dataset.

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.

Where to go for a darker sky near Gretna

The closest place in this dataset with a meaningfully darker sky is New Orleans, LA, roughly 12 miles away in a straight line, rated rural. Road distance will be more.

New Orleans, LA is itself still a measured city, not a designated dark-sky park, this only compares against the 3,206 places this dataset covers.

How Gretna compares nationally

About 17,185 people live in Gretna, LA, sized enough to appear in this dataset of 3,206 incorporated US cities. Gretna places 3,107 of 3,206 cities in this dataset's darkest-to-brightest order.