AMP: 3 Location: SH-43 and US-20, Bonneville Cty No signage as SH-43 begins as we head into the town of Ucon. 43 is Idaho’s shortest state highway (U.S. 195 is the only shorter route). AMP: 3 Locaiton: SH-43 and Market St, Ucon A couple blocks later, SH-43 will turn left to head south on Old US-91 … Continue reading Idaho State Highway 43, US-20 to US-26