Theodore Roosevelt, often hailed as the "Conservation President," is credited with establishing five national parks during his tenure from 1901 to 1909. These were Crater Lake (1902), Wind Cave (1903), Sullys Hill (1904, later changed to a game preserve), Platt (1906, now part of Chickasaw National Recreation Area), and Mesa Verde (1906). Beyond these specific parks, his legacy is staggering; he signed the Antiquities Act of 1906, which allowed him to bypass Congress to protect land as national monuments, including the Grand Canyon. By 2026, historians estimate that Roosevelt protected approximately 230 million acres of public land. This supportive peer insight helps explain why his face is carved into Mount Rushmore; he didn't just govern a country, he actively insured its natural beauty would be preserved for the centuries that followed, setting the gold standard for global environmental policy.