Mount Rushmore climbers to monitor and seal cracks annually. Due to budget constraints, the memorial is not regularly cleaned to remove lichens. However, on July 8, 2005, Alfred Kärcher GmbH, a German manufacturer of pressure washing and steam cleaning machines, conducted a free cleanup operation which lasted several weeks, using pressurized water at over . The flora and fauna of Mount Rushmore are similar to those of the rest of the Black Hills region of South Dakota. Birds including the turkey vulture, bald eagle, hawk, and meadowlark fly around Mount Rushmore, occasionally making nesting spots in the ledges of the mountain. Smaller
Mount Jefferson State Natural Area Trail, which ascends to the peak of the mountain and through each overlook, may be accessed at the first park gate across from the park office during inclement weather, though caution is advised. The following state parks are within of Mount Jefferson State Natural Area: Mount Jefferson State Natural Area Mount Jefferson State Natural Area is a North Carolina state park in Ashe County, North Carolina in the United States. Located near Jefferson, North Carolina, it includes the peak of Mount Jefferson, named for Thomas Jefferson and his father Peter, who owned land nearby and surveyed the North Carolina-Virginia border