Location: US-12 and White Butte Rd, Perkins Cty Reassurance shield as US-12 enters South Dakota. Location: US-12 and SD-73, Perkins Cty Before we get to Lemmon, we’ll approach SD-73. Location: US-12 and SD-73, Perkins Cty Follow 73 south to Faith. 73 north will join US-12 for several miles and serve Lemmon. Location: US-12 and SD-73, … Continue reading U.S. Route 12, ND State Line to SD-73