KILLOUGH CREEK. Killough Creek, the major source stream of Crysup Lake, rises two miles northwest of Jacksonville in northwest Cherokee County (at 32°01' N, 95°19' W) and runs northwest for five miles to its confluence with Flat Creek, just south of Farm Road 855 (at 32°05' N, 95°22' W). The stream gets its name from the Killough Cemetery, located on its east bank 2½ miles southeast of Flat Creek. The Killough Monument there commemorates the Killough Massacre. Killough Creek runs through a valley of loamy sand overlying red clay between 400-foot ridges where evergreen and deciduous trees grow.
Cherokee County History (Jacksonville, Texas: Cherokee County Historical Commission, 1986).