Saguaro Cactus in Saguaro National Park The Saguaro more then anything else symbolizes the old west. They are only found in the Sonoran desert. The reason is the Sonoran desert is the only desert that has 2 rainy seasons. One in the winter and the other in the summer. The Saguaro goes dormant in the winter so without the summer rain it can't survive. Choose another thumbnail from the list on the left, or return to the front page.