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Happy 100th Birthday! US National Parks in Photos

Mount Rainier National Park

Mount Rainier at sunrise

(Image credit: Bob Kim/U.S. Department of the Interior)

In 1899, President William McKinley created the United States' fifth National Park with Mount Rainier National Park in Washington.

The National Park of American Samoa

A stunning image captures the Milky Way in the night sky above the National Park of American Samoa.

(Image credit: National Pakr Service.)

The only National Park in the Southern Hemisphere on Ofu Island, the National Park of American Samoa was established Oct. 31, 1988.

North Cascades National Park Complex

North Cascades National Park Service Complex wallpaper

(Image credit: National Park Service)

Made up of three national parks units in Washington — the North Cascades National Park, Ross Lake National Recreation Area and Lake Chelan National Recreation Areas — the North Cascades National Park Service Complex was established Oct. 2, 1968.

Olympic National Park

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(Image credit: NPS.)

On June 29, 1938, President Franklin Roosevelt created Olympic National Park in Washington.

Petrified Forest National Park

petrified forest national park, fossils

(Image credit: Linda & Dr. Dick Buscher)

Over several years and thanks to both President Dwight D. Eisenhower and President John F. Kennedy, the Petrified Forest National Park in Arizona was created in 1962.

Pinnacles National Park

new national park, condors

(Image credit: Phil Stoffer, USGS.)

On Jan. 10, 2013, Pinnacles National Monument in California officially became a National Park.

Redwood National Park

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(Image credit: NPS.)

Established in 1968, the Redwood National Park in California, combined with California's own Del Norte Coast, Jedediah Smith, and Prairie Creek Redwoods State Parks, consists of 133,000 acres.

Rocky Mountain National Park

rocky mountain national park

(Image credit: Don Becker, USGS)

Rocky Mountain National Park in Colorado became the 10th National Park in the United States on Jan. 26, 1915, thanks to the efforts of Enos Mills and President Woodrow Wilson.

Saguaro National Park

Saguaro National Park national park service

(Image credit: National Park Service)

While President Hoover created a monument on March 1, 1933, Congress designated the site as Saguaro National Park on Oct. 14, 1994.

Sequoia National Park

A woman stands against a giant sequoia in Sequoia National Park in California.

(Image credit: Rob van Esch | Shutterstock)

On Sept. 25, 1890, Sequoia National Park in California was created.