From the center of Tucson travel west on Speedway Boulevard over Gates Pass to Kinney Road. Turn right (north) on Kinney Road and drive for 4 miles. At the junction of Kinney and Mile Wide Roads (one mile past the Desert Museum) turn right into Saguaro National Park. Continue north 1 mile on Kinney Road to the Red Hills Visitor Center, on the right.
Sigma SD14 DSLR, Sigma 10-20mm @ 10mm, f/6.3, 1/100s, ISO 200
I shot this image late in the afternoon in the Tucson Mountain District of Saguaro National Park west of the city of Tucson. I used portrait mode to emphasize the height of the cactus.