This former Southern Pacific branch stretched from the present-day location of the California state Railroad Museum in Sacramento to Walnut Grove, CA. The right-of-way passes through the outskirts of downtown Sacramento, suburban sprawl, and lastly agricultural land. Much the line is still traceable, and the track is still in place south of Baths until Hood Franklin Road, although much of it is being overtaken by vegetation.
The CSRM's Sacramento Southern Railroad currently operates on 3 miles of the route along a levee between the museum and a location called "Baths." It may be extended further down the line in the future.
Thanks to Paul Carr for contributing information about this route.