 This route remained in steady use until the development of more established stagecoach roads in the 1860s (and later the railroad in the 1880s) along the Sacramento River to the east.Today the valley is served by California State Route 3, linking Hayfork, CA & Weaverville, CA to Yreka, Ca.It serves as the link between other regional thoroughfares, California State Route 299 & California State Route 36 to the northern stretch of the regions primary north-south expressway, Interstate 5 (California).