SIGNAL HILL
Custer County - Black Hills National Forest - 2E-3S-2
July 22, 1939: "There is a 30-foot wooden tower at Signal hill located in the Limestone country about three miles northwest of Alkali springs. This station is manned only during times of emergencies, as the area covered by this lookout is now adequately surveyed by Elk mountain and Summit ridge stations." (Rapid City Journal)