Location: I-25 and SR-181, Sierra Cty Reassurance shield after the 181 junction as we prepare to cross a gorge Location: I-25 and SR-181, Sierra Cty 49 miles to junction US-380. At the top of the hill in the distance, SR-1 will exit without shieldage. SR-1 is another old US-85 alignment, which itself is an old … Continue reading U.S. Route 85, NM-181 to NM-1