AMP: 0 Location: S-463 and I-90, Big Horn Cty Just after the 451/old US-87 junction, we’ll approach I-90. Location: S-463 and I-90, Big Horn Cty Follow 90 east/87 south to Sheridan and 90 west/87 north to Billings. Location: S-463 and I-90, Big Horn Cty Turn right for I-90 east/unsigned US-87 south. Stay straight and turn left … Continue reading Montana Secondary Highway 463, S-451 to I-90/US-87