Get ready for Custer State Park's biggest annual event, the buffalo roundup, with a look back at its 100-year history.

Established in 1919, Custer State Park is South Dakota's first and largest state park. 

According to the South Dakota Department of Game, Fish and Parks, the park started as the Custer State Forest in 1912, then was established as Custer State Park on July 1, 1919, by the South Dakota Legislature at the urging of then-Gov. Peter Norbeck.

The 110-square-mile preserve is home to alpine resorts, scenic drives, bison herds, woodlands and finger-like granite spires that rise from the forest floor.

It was named for Lt. Col. George Armstrong Custer, whose 1874 expedition brought 1,000 men and a hundred wagons to the Hills, discovered gold and forever changed the last region of the U.S. to be mapped.

In honor of the park's 100th birthday, here are 100 photos from our archives of this beautiful spot.