California State Route 139

State Route 139

Route information

Defined by

Maintained by Caltrans

Length:

143.26 mi (230.55 km)

History:

State highway in ca. 1940 and 1959; numbered by 1946

Major junctions

South end:

North end:

OR 39 north and

SR 161 west at Oregon state line

Highway system

←

→

State Route 139 (SR 139) is a state highway in the U.S. state of California. Running from SR 36 in Susanville north to Oregon Route 39, it forms part of the shortest route between Reno, Nevada, and Klamath Falls, Oregon. SR 139 cuts through much Modoc National Forest and passes near Antelope Mountain and Tule Lake. The entire route is part of the California Freeway and Expressway System, but is a two-lane road. North of the SR 299 overlap, SR 139 is an eligible State Scenic Highway, but has not been designated as such; the short piece north of Tulelake is however part of the federal Volcanic Legacy Scenic Byway. The portion north of SR 299 is also in the Interregional Road System as a High Emphasis Route and in the National Highway System. North of SR 299, the highway was built by the federal government and turned over to the state in about 1940; the remainder was built by a joint highway district of Lassen and Modoc Counties, completed in 1956, and given to the state in 1959.