Bayou Bartholomew is the longest bayou in the world meandering approximately 364 milesbetween the U.S. states of Arkansas and Louisiana.It contains over 100 aquatic species making it the second most diverse stream in North America. Known for its excellent bream, catfish, and crappie fishing, portions of the bayou are considered some of the best kept secrets of Arkansas anglers. It starts northwest of the city of Pine Bluff, Arkansas in the Hardin community, winds through parts of Jefferson, Lincoln, Desha, Drew, Chicot, and Ashley counties in Arkansas, and Morehouse Parish, Louisiana, and eventually dumps into the Ouachita River after passing by the northernmost tip of Ouachita Parish, near Sterlington, Louisiana. The bayou serves as the primary border separating the Arkansas Delta from the Arkansas Timberlands.