http://mcmcweb.er.usgs.gov/drg/free_drg.html This site has links to websites that have made USGS DRG's (Digital Raster Graphics), essentially scanned in paper topo quads, freely available.
I know that many of you have purchase maps and software such as Topo USA 2.0, but I figured that this would be a good resource for others. Especially those of us that live in states where that have no sanctioned OHV trails authorized for 4x4 use
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:wq!
2000 Silver Ice SE 4x4 5Speed
Southeast Xterra Club