How U.S. National Parks Were Created: Laws, Proclamations, and a Century of Conservation

Foundational Milestones

• 1872: Yellowstone—world's first national park, by Act of Congress.
• 1916: National Park Service (NPS) created (Organic Act) to manage parks.
• 1906: Antiquities Act—president can proclaim national monuments (many become parks).

Diverse Creation Pathways

Key Legislative Acts

• 1933: Civilian Conservation Corps built infrastructure.
• 1964: Wilderness Act—designated wilderness within parks.
• 1970: NEPA—environmental impact review.
• 1972: Endangered Species Act—habitat protection.
• 1980: ANILCA—added 100M acres in Alaska (Wrangell-St. Elias, Denali, Gates of Arctic).

Current System

400+ units (63 "National Parks" plus monuments, seashores, battlefields, etc.). Managed by NPS (Dept. of Interior) for preservation unimpaired for future generations + public enjoyment.