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Yosemite Valley and Maripose Grove of Giant Sequoias became a state park.
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Yellowstone is made the first national park.
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Yosemite was made a national park.
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President Roosevelt signed the Antiquities Act.
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Stephen Mather is sworn in as the Assistant of the Secretary of Interior.
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The Mather Mountain Party began.
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The National Park Service Organic Act was signed, this created the National Park Service. This was also the day Stephen Mather became the first director of the National Park Service.
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Horace Albright was sworn in as the second director of the National Park Service.
