Wrangell-St. Elias (13.1 million acres)

Nearly four times the size of Yellowstone, Wrangell-St. Elias also contains four mountain ranges, with nine of the highest peaks in North America.

Gates of the Arctic (8.4 million acres)

Gates of the Arctic is archetypal Alaska, with its towering mountains and wealth of wildlife.

Denali (6 million acres)

There's no best way to take on Denali, which offers surprises at every turn—it's miles and miles of possibility.

Katmai (4 million acres)

With no roads into the park, every trip to Katmai starts with an adventure travel by boat or floatplane over sparkling lakes and powerful rivers.

Lake Clark (4 million acres)

From wildlife viewing and fishing to cultural history and landscapes, Lake Clark does justice to a wealth of grand outdoor options.

Death Valley (3.4 million acres)

Hottest, driest, lowest, largest...Death Valley dazzles, even intimidates, with superlatives.

Glacier Bay (3.2 million acres)

With so many stunning views (including a lot of wildlife), you can hike just about anywhere you'd like in Glacier Bay. The only limits: ice and impassible thickets of alder.

Yellowstone (2.2 million acres)

The world's first national park, Yellowstone was established before the states that now surround it became part of the Union.

Kobuk Valley (1.7 million acres)

Seeing maybe 5,000 travelers a year, Kobuk Valley is one of the most vital areas protected by the National Park Service.

Everglades (1.5 million acres)

Unlike many western parks with their scenic mountains and canyons, Everglades was set aside to preserve an ecosystem compromising of animals and plants found nowhere else.