Sequoia & Kings Canyon National Parks, Protected areas in Sierra Nevada, United States

Sequoia and Kings Canyon are two adjoining protected areas in the Sierra Nevada that cover mountain ranges, deep valleys, and forests of giant trees. The terrain stretches from low river valleys to high peaks that show hiking trails in summer and snow cover in winter.

The two parks were created to protect giant sequoias from logging after many forests were cut down during the 19th century. Management began operating both areas together to preserve the landscape as a connected whole.

The parks take their name from the giant sequoia (Sequoiadendron giganteum), which grows in groves such as Giant Forest. Archaeological sites in the area date back at least five thousand years, recording Native American presence across the Sierra Nevada. Sheep grazing from 1850 to 1900 and cattle grazing from 1850 to 1940 changed the mix and extent of upland and foothill vegetation.

Ranger stations distribute maps and provide updates on trail conditions, weather, and wildlife sightings throughout both parks. Many roads and campgrounds close in winter due to snow, so checking conditions beforehand helps plan your visit.

The parks contain about 200 marble caves, and Crystal Cave in Sequoia National Park is the one open to guided tours. Its passages hold marble formations shaped by dripping water, a rock type that dissolves in acidic groundwater.