- The Black Hills are a mountain range located in western South Dakota and northeastern Wyoming, in the United States.
- The highest point in the Black Hills is Harney Peak, which has an elevation of 7,242 feet (2,207 m) above sea level.
- The Black Hills were formed by the uplifting of the Black Hills Dome, a region of the Earth's crust that was pushed upwards by the movement of tectonic plates.
- The Black Hills are composed primarily of igneous and metamorphic rocks, such as granite, schist, and gneiss.
- The Black Hills are home to a variety of plant and animal life, including ponderosa pine, spruce, fir, aspen, and oak trees, as well as elk, deer, bighorn sheep, and mountain goats.
- The Black Hills are also home to several Native American tribes, including the Lakota, Dakota, and Nakota people, who have lived in the region for centuries.
- The Black Hills were the site of the Battle of the Little Bighorn in 1876, in which the Lakota and Dakota people, led by Sitting Bull and Crazy Horse, defeated the United States Army.
- The Black Hills are a popular tourist destination, and are home to several national parks and monuments, including Mount Rushmore National Memorial, Custer State Park, and Wind Cave National Park.
- The Black Hills are also home to several ski resorts, golf courses, and other recreational opportunities.