Driving on a 4x4 trail in the Tonto National Forest called the Four Peaks Trail, you are out in the desert wilderness. During April and May, the saguaro cactus blooms and it is the most special time to be in the desert. he saguaro cactus are only found within a small area within the Sonoran Desert and when they bloom in the spring, I love to drive out to areas where they are growing abundantly.