| Name | Location | When created | Area (acres) | Description |
|---|
| Devil's Tower | Wyoming | Sept. 24, 1906 | 1152 | Remarkable natural rock tower, of volcanic origin, 1200 feet in height. |
| Montezuma Castle | Arizona | Dec. 8, 1906 | 160 | Prehistoric cliff dwelling ruin of unusual
size, situated in a niche in face of a
vertical cliff; of scenic and ethnological interest. |
| El Morro | New Mexico | Dec. 8, 1906 | 160 | Enormous sandstone rock eroded in form of a castle, upon which inscriptions have been placed by early Spanish
explorers; contains cliff dweller ruins; of great historic, scenic, and ethnological interest. |
| Chaco Cañon | New Mexico | Mar. 11, 1907 | 20,629 | Contains numerous cliff dweller ruins, including communal houses in good condition and but little excavated. |
| Muir Woods | California | Jan. 9, 1908 | 295 | Contains one of the most noted redwood groves in California; was donated by Hon. William Kent, Member of Congress; located seven miles from San Francisco. |
| Pinnacles | California | Jan. 16, 1908 | 2080 | Contains many spirelike rock formations, 600 to 1000 feet high, which are visible for many miles; also numerous caves and other formations. |
| Tumacacori | Arizona | Sept. 15, 1908 | 10 | Contains ruins of Franciscan mission dating from sixteenth century, until recent years in
fair preservation, but now rapidly disintegrating. |
| Mukuntuweap | Utah | July 31, 1909 | 15,840 | Contains magnificent gorge, depth from 800 to 2000 feet, with precipitous walls and many
waterfalls. Of great beauty and scenic interest. |
| Shoshone Cavern | Wyoming | Sept. 21, 1909 | 210 | Cavern of considerable extent, located near Cody. |
| Natural Bridges | Utah | Sept. 25, 1909 | 2740 | Contains three natural bridges, among largest examples of their
kind. Largest bridge is 222 feet high, 65 feet thick at top of arch; arch is 28 feet wide; span 261 feet; height of span 157 feet. Other two are only slightly smaller. |
| Gran Quivira | New Mexico | Nov. 1, 1909 | 160 | One of the most important of earliest Spanish mission ruins in the Southwest. Monument also contains Pueblo ruins. |
| Sitka | Alaska | Mar. 23, 1910 | 57 | Park of great natural beauty and historic interest as scene of massacre of Russians by Indians. Contains 16 totem poles of best native workmanship. |
| Rainbow Bridge | Utah | May 30, 1910 | 160 | Unique natural bridge of great scientific interest and symmetry.
Height 309 feet above water; span is 278 feet, in shape of rainbow. |
| Lewis and Clark Cavern | Montana | May 16, 1911 | 160 | Immense limestone cavern of great scientific interest, magnificently decorated with stalactite formations.
Cavern now closed to public because of depredations by vandals. |
| Colorado | Colorado | May 24, 1911 | 13,883 | Contains many lofty monoliths and is wonderful example of erosion; of great scenic beauty and interest. |
| Petrified Forest | Arizona | July 31, 1911 | 25,625 | Contains abundance of petrified coniferous trees, one of which forms a small natural bridge. Is of great scientific interest. |
| Navajo | Arizona | Mar. 14, 1912 | 360 | Contains numerous pueblo or cliff dweller ruins, in good preservation. |
| Papago Saguaro | Arizona | Jan. 31, 1914 | 2050 | Contains splendid collection of characteristic desert flora and numerous pictographs. Interesting rock formations. |
| Dinosaur | Utah | Oct. 4, 1915 | 80 | Contains deposits of fossil remains of prehistoric animal life of great scientific interest. |
| Sieur de Monts | Mount Desert Island, Maine | July 8, 1916 | About 5000 | Beautiful island scenery, mountains, lakes, meadows, numerous varieties of birds and plants. Historical Associations. |
| Capulin | Northeast Corner New Mexico | 1916 | 681 | Magnificent specimen of a volcanic cinder cone, 8000 feet high; crater 1500 feet in diameter, cone-shaped; numerous "blister cones." |
| Name | Location | When created | Area (acres) | Description |
|---|
| Gila Cliff Dwellings | New Mexico | Nov. 16, 1907 | 160 | Contains numerous cliff dweller ruins of much interest and in good preservation. |
| Tonto | Arizona | Dec. 19, 1907 | 640 | Contains numerous cliff dweller ruins of much interest and in good preservation. |
| Grand Cañon | Arizona | Jan. 11, 1908 | 806,400 | Contains the most wonderful portion of the Grand Cañon of the Colorado. |
| Jewel Cave | South Dakota | Feb. 7, 1908 | 1280 | Contains a limestone cavern of much beauty and considerable extent, limits of which are as yet unknown. |
| Wheeler | Colorado | Dec. 7, 1908 | 300 | Of much interest from geological standpoint as example of eccentric erosion and extinct volcanic
action. Of much scenic beauty. |
| Oregon Caves | Oregon | July 12, 1909 | 480 | Extensive caves in limestone formation of much beauty. Magnitude not entirely ascertained. |
| Devil Postpile | California | July 6, 1911 | 800 | Spectacular mass of hexagonal basaltic columns, like an immense
pile of posts. Said to rank with famous Giant's Causeway, in Ireland. |
| Mount Olympus | Washington | Apr. 17, 1912 | 299,370 | Contains many objects of great and unusual scientific interest, including many glaciers.
Is summer range and breeding-ground of Olympic elk. |
| Walnut Cañon | Arizona | Nov. 30, 1915 | 960 | Contains cliff dwellings of much scientific and popular interest. |
| Bandelier | New Mexico | Feb. 11, 1916 | 18,000 | Contains vast numbers of cliff dweller ruins, with artificial caves,
stone sculpture and other relics of prehistoric life. |