California State Route 139 - Route Description

Route Description

State Route 139 begins at SR 36 in Susanville, and heads northeast up Antelope Mountain along the eastern edge of Susanville Ranch Park before turning north and descending into the Eagle Lake Basin, passing along the eastern edge of Eagle Lake and later the Said Valley Reservoir. The highway continues north and northwest through valleys and over hills and through a part of the Modoc National Forest, through the community of Avila Place, and then enters the east end of the Big Valley, where it begins to overlap SR 299 through Adin. The combined routes continue northerly through another part of the forest and over Adin Pass into the Warm Springs Valley, where SR 139 splits to the northwest near Canby.

SR 139 runs northwest and north over mostly flat terrain through the center of the national forest and the communities of Ambrose and Perez before turning northwest. The route continues through Copic, Newell, Stronghold, Homestead, and Tuber before cutting across the intermittent Tule Lake as the Lava Beds Highway through the city of Tulelake to the Oregon state line at Hatfield. At an intersection right on the state line, SR 161 begins to the west, and Oregon Route 39 continues northwest towards Klamath Falls.