Noatak National Preserve  

This huge wilderness park in northwest Alaska protects 250 miles of the Noatak River — the largest untouched mountain watershed in the country. Because the preserve has so little human presence, it’s an International Biosphere Reserve, giving scientists a baseline for measuring environmental health and natural processes of change. Herds of caribou migrate through the park, easily outnumbering human visitors.

Size: 6.5 million acres, larger than Denali National Park. Located northeast of Kotzebue, above the Arctic Circle.

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