Yes, you can see the Northern Lights (Aurora Borealis) in Theodore Roosevelt National Park, but it is a "special event" rather than a nightly occurrence. Because the park is located in Western North Dakota (roughly 47° N latitude), it is far enough north to catch the lights during periods of moderate-to-high solar activity. In 2026, we are currently near the Solar Maximum, meaning the frequency of sightings is much higher than usual. To see them, you need a clear, moonless night and a "Kp-index" of at least 4 or 5. The park's "North Unit" near Watford City is generally better for viewing as it has even less light pollution than the South Unit near Medora. The lights usually appear as a faint green glow on the northern horizon, though during a solar storm, they can dance overhead in vibrant pinks and purples. It is a grounded recommendation to use an app like "Aurora Forecast" to track geomagnetic activity; if you see a "spike" in the data, head to an elevated plateau in the park for a wide, dark view of the northern sky.