AMP: 54 Location: US-87 and S-426, Judith Basin Cty A couple miles later, as we near the community of Moccasin, we’ll approach S-426. AMP: 54 Location: US-87 and S-426, Judith Basin Cty Turn right for 426, which follows an unpaved alignment back to Lewistown. Stay straight to continue to Great Falls.  W to S-207, E to US-191/MT-3 … Continue reading Montana Highway 200, S-239 to S-426