[1] The main line was built primarily by the Northwestern Pacific Railroad and received regular service until 1958 when passenger trains were discontinued south of Willits.
After the decline in railway traffic in the post-WWII years, the line was eventually closed to all rail activity.
The right-of-way was acquired by a special-purpose district and reopened to freight movements in 2011 and passenger service on August 25, 2017.
Gauntlet tracks are installed at stations north of Ignacio to allow freight trains to pass with proper clearance.
d Free street parking Suggestions have been put forward to eventually expand to Napa or Solano counties with connections at Suisun–Fairfield station,[7] or north along the Northwestern Pacific right of way to Ukiah or Willits[8][9] in Mendocino.