Depicts John Muir and Theodore Roosevelt with Yosemite National Park’s Half Dome in the background.

John Muir (1838–1914) also known as "John of the Mountains", was a Scottish-American naturalist, author, environmental philosopher and early advocate of preservation of wilderness in the United States. His letters, essays, and books telling of his adventures in nature, especially in the Sierra Nevada of California, have been read by millions. His activism helped to preserve the Yosemite Valley, Sequoia National Park and other wilderness areas.

Theodore "TR" Roosevelt (1858–1919) was an American statesman, author, explorer, soldier, naturalist, and reformer who served as the 26th President of the United States from 1901 to 1909. Making conservation a top priority, he established a myriad of new national parks, forests, and monuments intended to preserve the nation's natural resources.

Half Dome is a granite dome at the eastern end of Yosemite Valley in Yosemite National Park, California. It is a well-known rock formation in the park, named for its distinct shape. One side is a sheer face while the other three sides are smooth and round, making it appear like a dome cut in half. The granite crest rises more than 4,737 ft (1,444 m) above the valley floor.

Depicts the National Park Service logo.

The elements on the National Park Service logo represent the major facets of the national park system. The Sequoia tree and bison represent vegetation and wildlife, the mountains and water represent scenic and recreational values, and the arrowhead represents historical and archeological values. The bison is also the symbol of the Department of the Interior. The logo became the official logo on July 20, 1951, replacing the previous emblem of a Sequoia cone, and has been used ever since. The design was slightly updated in 2001, and a few different renderings are used today.