ocr: Travel Guide x Locate South Dakota MORE TO SEE AND DO Kid Picks! Mount Rushmore National Memorial Keystone, South Dakota Schedule 5U5-/45-460U Open daily. Beginning in 1921, workers using dynamite, steam drills, and chisels took14! years to carve the faces of Information Presidents Wasnington,Jemerson, Teddy Rural Route 1, Box 190 Roosevelt, and Lincoln into the granite cliffs of Keystone, South Dakota 57751 wount Rushmore. The massive projectwas a boon to the Depression-era workforce. Today, 2.5 million 605-745-4600