Passenger service started in 1904 with steam engines until 1925 when diesel engines took over. Originally named the California Western Railroad, it was eventually renamed to the "Skunk Train" when people said "you can smell 'em before you can see 'em."
You can see an old 1965 video about the history of Fort Bragg and the Skunk Train.
Typically, the train leaves from Fort Bragg once or twice a day and returns back in the afternoon.
Many people make it a day outing for a ride through the the redwood forest, over bridges, through tunnels, and pass-through open meadows.
They seemed to be out of commission or waiting to be restored.