Saguaro National Park Tucson, Arizona. It takes up to 75 years for a Saguaro to grow one side arm. Most grow 40-60 ft high with a 10 foot girth and may live for more than 150 years. Enjoy the beauty and wildlife: road runners, coyote, bats, quail, scorpions and beautiful flowers on the way to the Sonora Desert Museum. It's a beautiful Arizona travel experience.