Manville Trail is a hiking trail in Pima County, Arizona. It is within Saguaro National Park (West) - Tucson Mountain District. It is 2.4 miles long and begins at 2,424 feet altitude. Traveling the entire trail is 4.7 miles with a total elevation gain of 242 feet. The Prehistoric Rock Art attraction and Signal Hill are near the trailhead. There are also a water, restrooms, a bbq, and information boards. The Signal Hill Picnic Area (elevation 2,444 feet) picnic site can be seen along the trail.