Last Driven August 2020 (Historic Photo: April 2013) AMP: 244 Location: US 93 and SH-75, Custer Cty Reassurance shield after SH-75. 93 gets its mileposts back, for the first time since Shoshone. AMP: 245 Location: US 93 and Blue Mountain Rd, Challis A mile or so later, we’ll enter Challis. AMP: 245 Location: US 93 and Main … Continue reading U.S. Route 93, SH-75 to US-93 Spur