AMP: 87 Location: US-87 and Highwood Rd, Cascade Cty A few miles later, we’ll approach Secondaries 227 and 228. AMP: 87 Location: US-87 and Highwood Rd, Cascade Cty Follow 228 north to Highwood and 227 south to Sand Coulee. AMP: 87 Location: US-87 and Highwood Rd, Cascade Cty Turn right for 228 north and left for 227 south. … Continue reading Montana Highway 3, S-331 to S-227/S-228