Roosevelt Creates First National Monument

Context

By the early twentieth century, rapid settlement of the American West had placed unique geological features and archaeological sites at risk from mining claims, homesteading, and commercial development. Conservationists and scientists pressed Congress for stronger safeguards after earlier laws, such as the Forest Reserve Act of 1891, proved too limited for targeted protection of individual landmarks. Wyoming’s Devils Tower, a towering igneous butte long regarded as sacred by several Native American tribes, had already drawn local attention; in 1892 Senator Francis E. Warren secured a temporary forest reserve around the formation and the nearby Missouri Buttes, but a bill to convert the area into a national park stalled in committee.

What Happened

The breakthrough came with the Antiquities Act, signed by Roosevelt on June 8, 1906, which authorized the president to proclaim national monuments on federal lands containing “objects of historic or scientific interest.” Wyoming Representative Frank W. Mondell, a member of the House Public Lands Committee, championed the Tower’s candidacy and helped shape the proposal. On September 24, 1906, Roosevelt issued Proclamation 658, reserving 1,153 acres surrounding the 867-foot monolith. The document emphasized the formation’s dramatic columnar jointing and erosional history as a “natural wonder” of exceptional scientific value, deliberately excluding the Missouri Buttes to keep the reservation modest enough for effective management.

Aftermath

The designation immediately withdrew the reserved acres from homesteading and mineral entry, ending the threat of private development. The surrounding forest-reserve lands not included in the monument were opened to settlement two years later. Because the proclamation rested solely on executive authority, it required no further congressional appropriation or legislation, demonstrating the act’s speed and flexibility.

Legacy

Devils Tower became the prototype for more than one hundred subsequent national monuments, many of them likewise established by presidential proclamation rather than statute. Roosevelt himself created seventeen additional monuments before leaving office, protecting sites ranging from prehistoric ruins to volcanic landscapes. The precedent helped build momentum for the Organic Act of 1916, which created the National Park Service to administer both parks and monuments under unified professional standards. Today the site is recognized for both its geology and its enduring cultural importance to Indigenous peoples, illustrating how one executive action reshaped federal conservation practice.