Any companies that run strictly southwestern states?

Apart from relocating for regional and local gigs in the mountain and desert states, I just wanted to see if there were any outfits that stuck to CA/NV/UT/CO/NM/AZ and even TX.

The last place I ran with, I was primarily doing bottled water between Cabazon and Denver 90% of the time and stayed out for weeks on end without a problem.

I've ventured through all other parts of the country and when it comes down to it, the Southwest region is where I want to stay put.
As it sits, I've got a couple of offers on the table(been out of driving for the past five months, volutarily) and just wanting to see what else is out there that might suit my running interests.