Technically Boise and most of Southern Idaho is High Desert, no cactus though. The family and I travelled down to Prescott,AZ to attend my niece's graduation from Embry Riddle with a degree in aeronautical engineering. We took a few extra days to explore the area including: Sedona, Jerome, Slippery Rock, Montezuma's Castle, AZ Science Muzeum and a few other places. I would not of gone there without the graduation excuse but glad I did.