Adding select USFS data to maps

[BKSLDR7]

Recently, I was hiking cross country in the Sierras
near US 50.  I came across some old logging/jeep roads
but they were not on my GPSFileDepot California TOPO
OR on my USGS topo map.  It would have helped a lot
if they had been.  I noticed that the TAHOE Regional map
that I had at home has all the USFS roads including the ones
that I came across. 

How do I get this info on the
GPSFileDepot California TOPO?

[maps4gps]

The one currently available was not done by a gpsfiledepot 'member'.  If the data is in digital format, he might want to know about it and include it in the new mapset.

[BKSLDR7]

I have a post out to NGS Explorer forum asking about digital sources.
Here is the map that shows the information
http://shop.nationalgeographic.com/product/413/3914/320.html