Idaho State Highway 1
Route description
SH-1 runs 11.92 miles (19.18 km) from U.S. Route 95 (US-95) east of Copeland, north to BC 21 in Porthill. The route links Bonners Ferry, via US-95 south, Porthill, and Creston, BC. The road is the only state highway in Boundary County, the two other highways are US-95 and US-2. The highway starts at an intersection with US-95 east of Copeland.
History
SH-1 was originally created in the 1920s as part of Sampson Trail B, which ran from Boise north to Lewiston, Coeur d'Alene, before entering British Columbia at Porthill. Later in the mid-1930s, Idaho adopted a new numbered highway system with SH-1 as one of the first highways. The International Selkirk Loop, which uses SH-1, was formed in 1999. The loop became an Idaho Scenic byway on January 21, 2004, as the Wild Horse Trail.
Major intersections
The entire route is in Boundary County.
Location | mi | km | Destinations | Notes | |
---|---|---|---|---|---|
Copeland | 0.000 | 0.000 | US 95 | Southern terminus | |
Porthill | 11.130 | 17.912 | U.S. Customs Building | ||
11.185 | 18.001 | Hwy 21 | Northern terminus; Continues into British Columbia as BC 21 | ||
1.000 mi = 1.609 km; 1.000 km = 0.621 mi |