AMP: 127 Location: MT-200 and MT-21, Cascade Cty Just after 565, we’ll approach MT-21, which is one of those weird state highways that’s not state maintained AMP: 127 Location: MT-200 and MT-21, Cascade Cty Stay straight for Missoula. Follow 21 to Augusta. AMP: 127 Location: MT-200 and MT-21, Cascade Cty Turn right for 21. Stay straight for 200. … Continue reading Montana Highway 200, S-565 to MT-21