We have some free software that we let people use that displays current public/private ownership in the Western States on your PC. You can't beat it for having access to the most current information on land swaps and other such ownership changes from private to public or vice-versa. You get email notification when a new version of the map is updated.
The best part about it is having the ability to send the maps to your Garmin GPS and taking that boundary data with you in the field. You have to pay for the license to use the map on your GPS, but anybody is welcome to check the map out on the computer for FREE using Garmin's MapSource or BaseCamp software.
PM me with your name and email if so I can set you up in the MyMaps system to gain access to whichever Western State you want. With this access you can actually try the map on your GPS for 14 days.
This is a great tool for scouting out public lands also.