November 10, 1978
$10 per vehicle per week
2,240 feet at Little Missouri River
2,855 feet at Buck Hill
Lowest Average Temp
4°F in January
Record Low Temp
-49°F in 1950
Highest Average Temp
86°F in July
Record High Temp
110°F in 1981
Park Creation Timeline
On April 25, 1947 Theodore Roosevelt National Memorial Park is created, to honor and preserve Roosevelt's legacy of land protection.
On November 12, 1978 the park is elevated to full national park status.
Animals and Plants
Native mammals in the park include bison, elk, prairie dogs, coyotes, and badgers. Wild horses and longhorn steers in the park reflect the historic landscape as Theodore Roosevelt experienced it in the 1880s.
Reptiles include three types of turtle, sagebrush and short-horned lizards, and several species of snake, including the prairie rattlesnake, the only venomous snake in the park.
There are 185 species of birds found in the park at least part of the year. See the NPS compiled complete list
400 species of plants have been identified in the park. Grasslands are the most commom area in the park, composted mostly of saltgrass, western wheatgrass, needle-and-thread, and little bluestem. Rocky Mountain juniper is the most common type of forest. Hardwoods are mostly limited to the river areas, where cottonwood, ash, elm, and boxelder are found.