The Quartz Mountains are an extension of the Wichita Mountains in the far southwestern part of the state of Oklahoma. The section extends west and northwest of the main Wichita range separated by a plain dotted with smaller foothills. The tallest mountain in the range is Quartz Mountain at 2,040 feet. The area is popular for rock climbing on its weathered granite outcroppings and is home to Quartz Mountain State Park and Lake Altus-Lugert reservoir.