IRON MOUNTAINS. The Iron Mountains are a small range of hills nine miles northeast of Luling in southeastern Caldwell County (at 29°43' N, 97°31' W). The highest peaks of these hills stand at elevations of 647, 635, and 632 feet above sea level, roughly 150 to 200 feet higher than the surrounding countryside. The hills may have been named for the Iron Guards, a Civil War company organized in the area in 1861.
Maurine M. O'Banion, The History of Caldwell County (M.A. thesis, University of Texas, 1931).