6 miles west of Tucson, 15 minutes from downtown.Take St. Mary’s Rd. west for an intermediate two-hour loop in the Tucson Mountains. St. Mary’s Rd. turns into Anklam Rd. as it curves and approaches the mountain. Turn south into Starr Pass Resort, left at the stop sign, and right on the next road to the trailhead. The trail takes you over Starr Pass with beautiful views of the valley.