Naples, Idaho is on which 2571 mile-long highway that runs across the northern US?
Naples, Idaho Naples is a small unincorporated community in Boundary County, Idaho, United States. It lies 11 miles (18 km) south of the city of Bonners Ferry and 23 miles north of Sandpoint, on U.S. Routes 2/95 in the Rocky Mountains.
Idaho State Highway 33 State Highway 33 (SH-33) is a state highway in Idaho spanning from U.S. Route 20 (US-20) and US-26 to Wyoming Highway 22) at the Wyoming state line.