MARGARET PEAK. Margaret Peak, also known as Mount Margaret, is half a mile west of U.S. Highway 277 near the community of Tennyson in southeastern Coke County (at 31°45' N, 100°18' W). The peak has an elevation of 2,282 feet above sea level and rises 1,860 feet above the surrounding terrain. It is said to have been named for Margaret Beaumont, the wife of Capt. Eugene B. Beaumont, who served with the Fourth Cavalry in the area in the early 1870s.