MORGAN MOUNTAIN. Morgan Mountain overlooks the Colorado River four miles north of Mercury in northeastern McCulloch County (at 31°27' N, 99°10' W). Its summit is 1,424 feet above mean sea level, seventy-five to 100 feet higher than the surrounding countryside and 150 feet above the river.
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"MORGAN MOUNTAIN," Handbook of Texas Online
), accessed June 02, 2015. Uploaded on June 15, 2010. Published by the Texas State Historical Association.