From the west, LA 103 begins at an intersection with
US 190 just west of
Lawtell in western
St. Landry Parish. It proceeds north along the two-lane, undivided Prairie Ronde Highway and immediately crosses the
Union Pacific Railroad (UPRR) tracks. Approaching the point known as
Prairie Ronde, LA 103 turns to the northeast. It then intersects
LA 104 which heads toward
Mamou on the west and
Opelousas on the east. Continuing northeast, LA 103 passes through
Ledoux and crosses the
Acadiana Railway (AKDN) tracks. At a point northwest of
Plaisance, LA 103 intersects
US 167 and
LA 10 which are concurrent between
Ville Platte on the west and a point between Opelousas and
Washington on the east. LA 103 turns northwest to follow US 167/LA 10 briefly before resuming its northeastern course, now known as Grand Prairie Highway. Reaching
Grand Prairie, LA 103 turns to the southeast, intersecting
LA 363 which heads west through
Faubourg and eventually toward Ville Platte. LA 103 continues through a point known as
Soileau and then enters the town of Washington on West DeJean Street. ,
Louisiana, March 2016 In Washington, LA 103 intersects the concurrent LA 10 and
LA 182 (North Main Street). Here, LA 103 widens to a divided, four-lane highway as traffic continues southeast across North Main Street onto the eastbound lanes of St. Landry Veterans Memorial Highway. (Traffic from the westbound lanes of St. Landry Veterans Memorial Highway intersects North Main Street opposite Sittig Street and, in a brief concurrency with LA 10 and LA 182, turns southwest onto North Main Street for one block to reach West DeJean Street.) After three blocks, LA 103 narrows to a four-lane, undivided highway for a short distance before dividing again through an interchange with
Interstate 49 (I-49) at Exit 25. I-49 connects the town of Washington with
Alexandria to the north and Opelousas to the south. After passing through the interchange, LA 103 leaves Washington and narrows again to a two-lane, undivided highway. Just east of Washington, LA 103 crosses a bridge over
Bayou Carron and intersects
LA 743 which follows a parallel course along
Bayou Little Teche toward
Port Barre. LA 103 continues east roughly along
Bayou Wauksha, crossing
Bayou Courtableau and eventually intersecting with
LA 359. While LA 359 continues along Bayou Wauksha as it turns northeast toward
Waxia, LA 103 turns south at the intersection and heads toward Port Barre. About halfway to Port Barre, LA 103 curves to the southwest, then, upon reaching Bayou Courtableau, resumes a southerly course along the bayou into town. LA 103 enters Port Barre on Saizan Avenue, the town's main thoroughfare, and follows it as it turns southwest and crosses a bridge over Bayou Courtableau. Immediately after crossing the bayou, LA 103 intersects
LA 741 (Bayou Road) which it parallels for the remainder of its route toward
Leonville. LA 103 continues along Saizan Avenue and intersects US 190 on the south end of town. It then turns west, briefly running concurrent with the four-lane, divided US 190, before turning southwest along
Bayou Teche. LA 103 soon crosses the UPRR tracks and exits Port Barre. After about , LA 103 turns to the south while Church Road continues along the bayou. Cutting across a wide bend in the bayou, LA 103 curves southeast into Leonville. Upon reaching Bayou Teche once again, LA 103 arrives at its eastern terminus at an intersection with
LA 31. LA 31 connects to Opelousas on the northwest and
Arnaudville on the southeast. ==History==