It is open 24 hours a day, every day of the year. The Parks feature a wide variety of animals that include over 200 species of birds, gregarious slender salamander, western toad, western spadefoot toad, rainbow trout, coyote, wolverine, Mexican free-tailed bat, rubber boa, common kingsnake, and many more.
The area now occupied by the parks was originally inhabited by Native Americans. The Monache tribes, for example, would use the mountain passes as trade routes. As European settlers explored and settled in California, the indigenous population decreased rapidly due to the spread of foreign diseases such as smallpox. Preserving the area was not a priority for the settlers, who saw the area as a place for plentiful resources, particularly the sequoia trees (Sequoiadendron giganteum), as they were extremely plentiful and easily accessible. The Indians living there found themselves losing their only means of survival, and as a result of their desperation, they turned toward theft and crimes against the Spanish settlers in order to survive.
The Parks were separately founded by two different acts of Congress before being joined in 1943. Sequoia National Park was first preserved as land set aside for recreation through a bill passed by Congress and signed by President Benjamin Harrison on September 5th, 1890, largely due to the efforts of Colonel George W. Stewart, who is known as the "Father of Sequoia National Park". It wasn’t until a few months after the bill had passed that the park was given the National Park name by the Secretary of the Interior, John Noble. Stewart also collaborated with John Muir, who was known for his efforts to preserve Kings Canyon National Park, in order to achieve the formation of the National Park Service. Sequoia was expanded in 1926.
Before John Muir visited the area now known as Kings Canyon National Park, the area did not receive much attention, despite some settlers having moved there. Harold Ickes, the U.S. Secretary of the Interior was the one fighting for the formation of the Kings Canyon National Park. Before the area became an official park there were threats to the area. In 1920, the major threat was to create a reservoir in a part of the park known as the Cedar Grove Area. It was not until 1940 when the park was officially formed that the threats were dismissed.
Sequoia National Park and Kings Canyon National Park house various natural spectacles. The parks are a large part of the Sierra Nevada Mountain Range. Among the peaks is Mt. Whitney which, at 14,491 feet, is one of the tallest mountains in the United States. Other mountains range from elevation of 12,000 feet to 14,000 feet. It also houses the giant sequoia trees and is home to many canyons. Sequoia National Park and Kings Canyon National Park house about 200 marble caves combined.