AMP: 514 Location: I-90 and S-451, Big Horn Cty Reassurance shield after the 451 split. 451 is visible immediately to the right. AMP: 529 Location: I-90 and S-463, Big Horn Cty 15 miles later, we’ll approach S-463, which connects to Lodge Grass AMP: 530 Location: I-90 and S-463, Big Horn Cty Exit for S-463, which … Continue reading Interstate 90, S-451 to S-463