Well, in trying to keep the regions semi small to where small meets are possible, i thought of tat region consisting of Utah, Arizona, Colorado, and New Mexico... Thought of calling it the 4 Corner States or something... if you want to head up that region, go for it! And name it whatever you want, just make sure it has some kind of name that will describe the area like the others. If you do take up heading the region and creating the thread, try to use the outline that the other regions are using to keep it uniform and easy to sort out.
You up to it?