OLDEN LAKE. Olden Lake (at 32°22' N, 98°46' W) in Eastland County covers 130 acres on the Leon River, which is dammed two miles southeast of Eastland. The lake serves the area as a major source of electrical power. Its shores provide several campgrounds. The local shallow loam soils support tall grasses and shrubs. Olden Lake stands at an elevation of 1,408 feet above sea level.