Via Ptak Science Books, you can, at least, see the Texas frontier:
This map shows, with the colored dots, the counties where newspapers were published in 1882.
It’s apocryphal to judge that the American West begins at the 100th meridian.* For most people, that’s meaningless. But this map shows it clearly: the 100th meridian is the north-south line where the northern panhandle of Texas touches the main part of Oklahoma (which wasn’t even a territory when this map was printed). And the newspapers pretty much stop there.
* I knew the story of the 100th meridian when I drove across the country in 2009. We went through South Dakota, and it’s just about in the middle of the state. It really is a rather stark dividing line: you’re clearly in the greener, moister, midwest on the eastern side of the line … and when you pass the line, bare dirt, grassy prairies, and small cacti take over. You can see it in this aerial shot of Chamberlain, South Dakota:
I-90 crosses the Missouri River here. Note the trees in the foreground on the eastern side, and how they disappear once you leave the river valley on the western side. The 100th meridian is about 40 miles west of here (for those not up on the scale of these things, that means the 99th meridian is about 30 miles behind the photographer).