steam in the mountains of Oregon, 1910

OR&N stood for the Oregon Railroad and Navigation Company which operated a railway network of 1,143 miles (1,839 km) of track running east from Portland, Oregon, to northeastern Oregon, northeastern Washington and northern Idaho. OR&N operated from 1896 as a consolidation of several smaller railways initially as an independent carrier, but Union Pacific bought a majority stake in 1898. It became a subsidiary of UP named the Oregon–Washington Railroad and Navigation Company in 1910 and in 1936 UP absorbed the system.