US Dark-Sky Destinations

Trip-planning guides for astrophotography and stargazing. Each page combines computed sky-darkness data — Bortle class (a 1-9 scale for naked-eye sky darkness, 1 being the darkest) and SQM (sky quality in magnitudes per square arcsecond — higher is darker), plus Milky Way core season, from the same light-pollution rasters (VIIRS/Falchi) and ephemeris (NASA/JPL DE421) DarkHours uses for live reports — with live tonight conditions, named scouting locations and pull-offs, and field logistics: parking, permits, and access.