I've been to North Cascades, Wrangell, Great Basin, and Guadalupe Mountains, with plans to hit Isle Royale, Dry Tortugas, Congaree, and Voyageurs this year.


15 least-visited US National Parks in 2021

Gates of the Arctic National Park & Preserve, Alaska — 7,362 recreation visits
National Park of American Samoa — 8,495 recreation visits
Kobuk Valley National Park, Alaska — 11,540 recreation visits
North Cascades National Park, Washington — 17,855 recreation visits
Lake Clark National Park & Preserve, Alaska — 18,278 recreation visits
Katmai National Park & Preserve, Alaska — 24,764 recreation visits
Isle Royale National Park, Michigan — 25,844 recreation visits
Wrangell-St. Elias National Park & Preserve, Alaska — 50,189 recreation visits
Dry Tortugas National Park, Florida — 83,817 recreation visits
Glacier Bay National Park & Preserve, Alaska — 89,768 recreation visits
Great Basin National Park, Nevada — 144,875 recreation visits
Congaree National Park, South Carolina — 215,181 recreation visits
Denali National Park & Preserve, Alaska — 229,521 recreation visits
Voyageurs National Park, Minnesota — 243,042 recreation visits
Guadalupe Mountains National Park, Texas — 243,291 recreation visits