AMP: 15 Location: Pryor Rd and Blue Creek Rd, Yellowstone Cty No reassurance shield as 418 begins. It’s a pretty long trek down to Pryor from here. AMP: 0 Location: Pryor Rd and Pryor Gap Rd, Pryor, Stillwater Cty 15 miles later, 418 ends here at the junction with County Road 91. 91 heads towards St. Xavier. Follow … Continue reading Montana Secondary Highway 418, S-416 to Pryor