Borglum was initially involved in the carving of Stone Mountain in Georgia. Borglum's nativist stances made him seem an ideologically sympathetic choice to carve a memorial to heroes of the Confederate States of America, planned for Stone Mountain, Georgia. In 1915, coinciding with the Klan-glorifying, highly successful The Birth of a Nation, he was approached by the United Daughters of the Confederacy with a project for sculpting a 20-foot (6 m) high bust of General Robert E. Lee on the mountain's 800-foot (240 m) rockface. Borglum accepted, but told the committee, "Ladies, a twenty-foot head of Lee on that mountainside would look like a postage stamp on a barn door."
Borglum's ideas eventually evolved into a high-relief frieze of Lee, Jefferson Davis, and Stonewall Jackson riding around the mountain, followed by a legion of artillery troops. Borglum agreed to include a Ku Klux Klan altar in his plans for the memorial to acknowledge a request of Helen Plane in 1915, who wrote to him: "I feel it is due to the KKK that saved us from Negro domination and carpetbag rule, that it be immortalized on Stone Mountain".
Memorial to Robert Louis Stevenson at Baker Cottage, Saranac Lake, New York. Unveiled in 1915.