I cut mine in Colorado, Utah, and New Mexico. It grows along the waterways in these states. I understand it grows in many other arid states as well such as Texas and other. I have seen it in Nevada and California.
I have used it for a long time now, when I lived in Utah I run around with a couple of Navaho's they introduced me to this as arrow wood and many other things one of them even made Self Bows out of them.