According to David Myrick's book, Railroads of Nevada & Eastern California Vol 3, the AM Leach Lumber Co ran a short line
of just a few miles from the mill at Challenge,CA into the woods. The possible alignment is along Peterson Ridge Rd. Upon
visiting I could not find any evidence of a railroad but the grade was nice and flat. Here are a few pics from that trip.
A second trip along this road in Oct of 2013 still revealed no railroad evidence. However the road does dip down through a gully
that would have been trestled. I saw no signs of a trestle but did find, when looking back from the opposite side, a grade right where
it should be. The above image shows this.