saguaros loom high into the sky br spikes and spears br for survival br br Divided into two districts by Tucson, Saguaro National Park features 165 miles of hiking trails. Head west of the city to the Tucson Mountain District to hike the King Canyon Trail (3.5 miles one way) to 4,687-foot Wasson Peak, the highest point in the Tucson Mountains. The Rincon Mountain District east of the city features the Cactus Forest Loop Drive; bike this trail for spectacular views of both the Rincon range and the native plants and animals of the Sonoran Desert, including the iconic giant saguaro cactus, which can grow up to 50 feet tall and live as long as 200 years.