AMP: 0 Location: US 212 and S-342, Big Horn Cty Immediately after we leave I-90, turn right for S-342, a quick spur down to Little Bighorn  E to S-314, W to I-90 Bus  S to Little Bighorn Nat’l Battlefield  E to S-451, W to I-90 Bus S to S-451, N to I-90 Bus