Theodore Roosevelt National Park is one of the least-visited national parks in the US — which means Bortle 2 sky over dramatic badlands terrain with almost no other visitors after dark. The North and South Units give different badlands character.
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The South Unit near Medora is more accessible; the North Unit is more remote and marginally darker. Bison roam freely through both units after dark — maintain distance and be aware of animal movement. The badlands terrain is disorienting in the dark — stay on established viewpoints rather than hiking cross-country after astronomical twilight.
Season: May–October · Spring and fall optimal · Wind constant · New moon essential
Gear notes: Windproof layers, stay on viewpoints after dark (bison unpredictable), GPS or marked trail for any movement at night, extra layers
Moon phase · Bortle 2 · Transparency · Cloud cover
Push alerts · Saved locations · 3-day outlook
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