First Interstate Bank Address: 40 N 5th St, Custer, SD 57730 Phone: (605) 673-2215 Banks Other Businesses: Dacotah Bank at 35 S 6th St, Custer, SD 57730 First Interstate Bank at 648 Mount Rushmore Rd, Custer, SD 57730 Stone Canyon Mini Storage at 1500 Washington St, Custer, SD 57730 Sylvan Lake Lodge Restaurant at 24572 Sd Highway 87, Custer, SD 57730