John Muir was a Scottish-American naturalist, author, and early advocate for the preservation of wilderness in the United States. He spent much of his life exploring and writing about the Sierra Nevada mountain range in California, which he considered his favorite. He helped to establish Yosemite National Park and founded the Sierra Club to encourage the protection of wilderness.

1. John Muir “ The mountains are calling and I must go …” ~ John Muir in a letter to Sarah Muir Galloway Muir, John. Sierra Nevada - Head of South Fork Kings River, Yosemite Valley, Looking West