Those that you see in the MG are topography (topo) maps put out usually by dept. of interior/BLM in the state of interest.
Every one should carry BLM maps as well as a "good" local area map and GPS if your out in the unknowns.
But then again, if ya dont care where you are, your never lost....quoted from Tom Massie

In California, BLM sell them, you need to know what area your looking for as it relates to the right map to request
Map 1 is Yuba City
2 is Truckee
3 is Carson City
So on and so on through map 8
All this surrounds the Placerville map

You can also search them here under properties, with a nice little feature, click on the GPS cords and it moves you to google maps from which you can see the satellite view.

Bill

Ryan-   Topo maps are also available from the USGS, but run around $15 each.  Thge bright side is you can download them for free, and print them out at home.  A quad map, blown up to about  1 1/2 inch per square mile takes 9 sheets of paper.   I just trim them up and tape them together from both sides.

Bill's suggestion is good on the BLM maps showing their ground, and I'll toss in the USFS, both agencies sell their maps at all District/Ranger District and National Forest offices.  While at USFS get a set of the MVUM maps (free) for the areas you want.  They show what roads are open to motorized use.  Their policy for the past 10 years has been "closed unless posted open", and in most cases the MVUM's are their "posting"

You can also go to google earth (free to use) put in the coordinates into the search bare lat first, easy to use no sign or direction on latitudes within US, then enter longitude wit negative sign before it, only space between degrees, minutes and seconds and no direction (N, S, E, W) press search and it will come up. Microsoft has had the "snipping tool" from Vista forward and is a great way to copy and print or save like a screen shot. Google Earth will accept kml/kmz files form other programs or data downloads.