800-638-8350, tour begins at the Tucson Visitor Center, 110 S. Church Ave., Self-guided tour. Free. Allow 1 hour.The Turquoise Trail (formerly called the Presidio Trail) is a 2 ½ mile long loop trail through downtown Tucson that highlights structures and sites of historic interest and is marked by a turquoise stripe on the sidewalk. It begins at the site of the northeast corner of the reconstructed Presidio San Agustin del Tucson, founded in 1775. This presidio or fort was the first European structure in urban Tucson , constructed by the Spanish to mark the northern frontier of the Spanish empire in the Americas. The trail was created by the Tucson Presidio Trust for Historic Preservation. You can pick up walking tour brochures at the Presidio or at the Visitor’s Center located in the La Placita Shopping Center at 110 S. Church Avenue. (La Placita are brightly colored building with a gazebo in the center courtyard.) Also see the Visit Tucson: Official Travel Guide for full tour.
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