Location: US-12 and ND-8, Adams Cty Reassurance shield after the 8 split as we turn southeast to head to South Dakota. Location: US-12 at the South Dakota Line, Adams Cty Welcome to the Mount Rushmore State! 12 continues easterly across South Dakota to Minnesota.  E to SD-73, W to ND-8  N to ND-21, S to … Continue reading U.S. Route 12, ND-8 to SD State Line