It runs 43.06 miles (69.30 km) in an east–west direction from Shongaloo to Bernice, connecting to its parent route at either end.

parallels the route of LA 2 to the north, traveling through the town of Haynesville, where it intersects U.S. Highway 79 (US 79).

turns south, approaching the center of town and overlapping US 79 for one block, before resuming an eastward course along Sherman Street.

Here it zigzags briefly onto LA 9 before continuing southeast for 7.4 miles (11.9 km) to Weldon, where it crosses into Union Parish.

is an undivided two-lane highway for its entire length, except for the brief divided four-lane segment concurrent with US 63/US 167 at its eastern end.

[2] In the original Louisiana Highway system in use between 1921 and 1955, the entire route of LA 2 Alt.

[a][11] Its route has seen only one major change, the relocation of its western terminus from Sykes Ferry to Shongaloo in the early 1970s.

The only other change resulted from the recent widening of US 63/US 167 to four lanes in Bernice, concurrent with LA 2 Alt.