Access to the Sonoran Desert section in the Rincon Mountain district of the park is via the Cactus Forest Loop Drive. This eight-mile paved loop weaves among giant saguaro cacti in the foothills of the Rincon Mountains about 16 miles east of downtown Tucson.
Summer temperatures often exceed 110°F. Spring is the optimum time if you wish to engage in wildflower photography. Wildflower highlights include the California and Mexican poppy, the Mojave Aster, the Globe Mallow and the Desert Marigold.
In April when the daytime temperatures already approach 90°F, the cacti begin to flower in spectacular blooms. These include the Prickly Pear, the Fishhook Barrel Cactus and the Hedgehog Cactus. The signature bloom of the area, the Saguaro flower, occurs in June when the temperatures can easily exceed 100°F.