Idaho Northern Railroad
The Idaho Northern Railroad built a branch line of the Oregon Railroad and Navigation Company in northern Idaho, U.S., connecting the main line at Enaville with Paragon, a distance of. The company was incorporated on January 10, 1906, and opened on August 1, 1909 as an operating subsidiary of the Union Pacific Railroad, owner of the OR&N. On December 23, 1910, the property of the OR&N and Idaho Northern Railroad were conveyed to new UP subsidiary Oregon–Washington Railroad and Navigation Company.
The line was cut back from Paragon to Prichard after a December 1917 washout. A flood in December 1933 severely damaged the remainder of the line, and the Interstate Commerce Commission authorized its abandonment in 1935.
