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Bortle 2 ★ First Provisional Transboundary Dark Sky Park 📍 Montana, United States

Glacier National Park (Waterton-Glacier)

48.7596000° N, -113.7870000° E • Elevation: 1500m

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🌌 About This Observing Location

Glacial peaks and pristine alpine lakes beneath Montana's famous "Big Sky", shared across the Canadian border.

Bortle Scale Class 2
Elevation 1500 m
Latitude 48.76°
Longitude -113.787°

☁️ 4-Night Stargazing Cloud Forecast

Updated hourly via Open-Meteo
Wed, Nov 4
12%
Avg Night Cloud
Sunset: 17:10
Sunrise: 07:27
Optimal Sky
Thu, Nov 5
38%
Avg Night Cloud
Sunset: 17:08
Sunrise: 07:28
Fair Sky
Fri, Nov 6
97%
Avg Night Cloud
Sunset: 17:06
Sunrise: 07:30
Overcast Sky
Sat, Nov 7
85%
Avg Night Cloud
Sunset: 17:05
Sunrise: 07:31
Overcast Sky

✨ Darkness & Sky Quality

Class 2: Truly dark site with negligible glow.

Naked-Eye Limiting Mag: 7.1 – 7.5 mag
Milky Way Visibility: Brilliant with complex structures
Zodiacal Light: Distinct in spring/autumn

🛰️ ISS Transits & Flyovers

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