Louisiana Highway 15 is a state highway

State highway

State highway, state road or state route can refer to one of three related concepts, two of them related to a state or provincial government in a country that is divided into states or provinces :#A...

 in Louisiana

Louisiana

Louisiana is a state located in the southern region of the United States of America. Its capital is Baton Rouge and largest city is New Orleans. Louisiana is the only state in the U.S. with political subdivisions termed parishes, which are local governments equivalent to counties...

. It spans north/south for 264.56 miles (425.8 km).

Route description

LA 15 begins as an exit from U.S. Route 167

U.S. Route 167

U.S. Route 167 runs for 499 miles from Ash Flat, Arkansas at U.S. Route 62 to Abbeville, Louisiana at Louisiana Highway 14. It goes through the cities of Little Rock, Arkansas, Alexandria, Louisiana, and Lafayette, Louisiana....

 just south of Lillie and heads due east towards Spearsville. From Spearsville, LA 15 turns to the southeast and shortly merges with LA 2

Louisiana Highway 2

Louisiana Highway 2 is a state highway in the U.S. state of Louisiana. It runs in a west to east direction, beginning at State Highway 49 and ending at an intersection with U.S. Highway 65 in East Carroll Parish...

 and LA 33 in Farmerville. LA 15 then turns southeastward again, leaves Union Parish, and enters Ouachita Parish. LA 15 then heads due south and merges with U.S. Route 80

U.S. Route 80

U.S. Route 80 is an east–west United States highway, much of which was once part of the early auto trail known as the Dixie Overland Highway. As the "0" in the route number indicates, it was originally a cross-country route, from the Atlantic to the Pacific...

. U.S. 80/LA 15 then turns east through Claiborne, West Monroe and turns southeast and intersects with Interstate 20

Interstate 20

Interstate 20 is a major east–west Interstate Highway in the Southern United States. I‑20 runs 1,535 miles from near Kent, Texas, at Interstate 10 to Florence, South Carolina, at Interstate 95...

, southwest of downtown Monroe. LA 15 continues east-southeast through Ouachita Parish and passes through rural Richland Parish, where LA 15 turns due south and is joined by U.S. Route 425

U.S. Route 425

U.S. Route 425 is a north–south United States highway, first commissioned in 1989. Its route number is a "violation" of the usual AASHTO numbering scheme, as it comes nowhere near its implied "parent", U.S. Route 25....

 near Archibald, in a concurrence which continues to Ferriday

Ferriday, Louisiana

Ferriday is a town in Concordia Parish in northeastern Louisiana, United States. The population, which is three-fourths African American, was 3,723 at the 2000 census....

.

On the way to Ferriday, while in Franklin Parish, LA 15 passes through Baskin, Winnsboro, Gilbert, and Wisner. LA 15 then enters Catahoula Parish, where it passes through the town of Sicily Island. The highway turns east and enters Concordia Parish through Clayton.

LA 15 intersects U.S. Route 65

U.S. Route 65

U.S. Route 65 is a north–south United States highway in the southern and midwestern United States. The southern terminus of the route is at U.S. Route 425 in Clayton, Louisiana. The northern terminus is at Interstate 35 just south of Interstate 90 in Albert Lea, Minnesota...

 just south of Clayton before splitting from U.S. 425 at Ferriday.

South of Ferriday, LA 15 runs parallel to the Mississippi River

Mississippi River

The Mississippi River is the largest river system in North America. Flowing entirely in the United States, this river rises in western Minnesota and meanders slowly southwards for to the Mississippi River Delta at the Gulf of Mexico. With its many tributaries, the Mississippi's watershed drains...

 through Concordia Parish and Pointe Coupee Parish, where LA 15 ends at a three-way intersection with LA 1 and LA 970 in the town of Lettsworth

Lettsworth, Louisiana

Lettsworth is a small village located in the extreme northern tip of Pointe Coupee Parish, Louisiana, in the United States. It lies on the east bank of the Atchafalaya River near its intersection with the Mississippi River and the Red River at the Old River Control Structure. As of 2005, the...

.