Yosemite National Park

What It Covers

Yosemite National Park's 15-minute history covers 8,000 years of human presence, from Ahwahneechee indigenous stewardship through the 1890 national park designation, John Muir's conservation campaigns, and the controversial 1913 Hetch Hetchy dam approval.

Key Questions Answered

• •Indigenous Fire Management: The Ahwahneechee practiced controlled low-intensity burns for centuries, maintaining open meadows, recycling soil nutrients, and sustaining black oak acorn harvests. When the national park banned these burns, forest cover expanded, biodiversity declined, and catastrophic wildfire risk increased significantly.
• •Granite Formation: Yosemite's surface is 90% granite — igneous rock formed from slowly cooling underground magma over millions of years, then thrust skyward by tectonic faulting and sculpted by glaciers that carved the valley's sheer vertical walls into their current form.
• •Art as Conservation Tool: German painter Albert Bierstadt's emotionally charged Yosemite landscapes commanded $25,000 in 1867 — the highest price ever paid for an American painting at that time — directly driving Eastern public interest and tourist traffic that fueled early preservation momentum.
• •Political Alliance Strategy: John Muir secured Yosemite's federal protection by taking President Theodore Roosevelt on a private camping trip in 1903, deliberately excluding political handlers. Within three years, Roosevelt transferred the valley from mismanaged California state control to federal jurisdiction.