Glacier National Park, Montana · aurora
Glacier National Park, Montana northern lights
Glacier — a certified International Dark Sky Park shared with Canada's Waterton Lakes — pairs jagged peaks with skies dark enough that a strong aurora can glow above the Continental Divide. St. Mary Campground on the east side allows RVs and sits under some of the park's clearest northern horizons.
Best season
Best in winter, on new-moon / dark nights
Where
Glacier National Park (NPS) — certified International Dark Sky Park
Nearest RV base
St. Mary Campground, Glacier NP (RVs, motorhomes, trailers allowed)
Watch it honestly
Aim for winter and a new-moon, cloud-free night. The aurora is never guaranteed at this latitude — check the NOAA SWPC 30-minute aurora forecast and pick a dark, clear night well away from any glow.
Plan with the official source (and the NOAA SWPC aurora forecast): NPS — Glacier night sky .