MCKINNEY BAYOU. McKinney Bayou rises ten miles northwest of Texarkana in northeastern Bowie County (at 33°33' N, 94°14' W) and runs southeast for fifteen miles through the northwestern corner of Bowie County and Miller County, Arkansas, to its mouth on the Red River, near Ashdown, Arkansas (at 33°32' N, 94°00' W). The stream was probably named for Collin M. McKinneyqv and two of his sons, William C. and Ashley, who patented land near the head of the stream. The bayou is intermittent in its upper reaches. It crosses flat to gently rolling terrain surfaced by clay and sandy loam that supports grasses and mixed hardwoods and pines.