Louisiana Highway 631

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Louisiana Highway 631 marker

Louisiana Highway 631
Old Spanish Trail
Route information
Maintained by Louisiana DOTD
Length: 9.0 mi[1] (14.5 km)
Existed: 1955 renumbering – present
Major junctions
West end: US 90 in Des Allemands
  LA 306 in Paradis
East end: LA 52 in Boutte
Parishes: Lafourche, St. Charles
Highway system
  • Louisiana Highway System
LA 628 LA 632

Louisiana Highway 631 (LA 631) is a state highway in Louisiana that serves Lafourche and St. Charles Parishes. It spans a total of 9.0 miles (14.5 km) from west to east.[1] It is known locally as the Old Spanish Trail.

Route description[edit]

Louisiana Highway 631 is the middle of the three bridges crossing Bayou des Allemands at Des Allemands, Louisiana

LA 631 was the original route of US 90 before its current neighboring four-lane alignment was constructed. Its entire length parallels US 90 and the nearby railroad line. From the west, it begins at an intersection with US 90 in extreme eastern Lafourche Parish, just before Bayou Des Allemands. Crossing the bayou, it heads into St. Charles Parish and through the main part of Des Allemands. There it crosses the LA 631 Spur, LA 632, and LA 635. Just before Paradis, it meets LA 306. It then heads northeast to Boutte, crossing under (but not connecting to) Interstate 310/LA 3127 just west of its eastern terminus at an intersection with LA 52.

LA 631 is an undivided, two lane highway for its entire length.

Major intersections[edit]

Parish Location mi[1] km Destinations Notes
Lafourche Des Allemands 0.0 0.0 US 90 – New Orleans, Morgan City
St. Charles parish line
0.5 0.8 Bridge over Bayou Des Allemands
St. Charles 0.8 1.3
LA 631 Spur (Old U.S. 90)
Western terminus of LA 631 Spur
1.2 1.9 LA 632 (Levee Road) Western terminus of LA 632
Paradis 3.4 5.5 LA 635 Western terminus of LA 635
5.3 8.5 LA 306 (Bayou Gauche Road) Northern terminus of LA 306
Boutte 9.0 14.5 LA 52 (Paul Maillard Road)
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

Louisiana Highway 631 Spur[edit]

Louisiana Highway 631
Location: Des Allemands
Length: 0.5 mi[2] (0.8 km)
Existed: c. 1964–present

Louisiana Highway 631 Spur (LA 631 Spur) is a spur of LA 631 that serves Des Allemands, St. Charles Parish. It is an undivided, two-lane highway, spanning 0.5 miles (0.80 km) in a west to east direction.[2] In Des Allemands, LA 631 turns northward a few blocks away from US 90. LA 631 Spur continues on the same eastward trajectory. It intersects LA 632 before ending at an intersection with US 90.

The entire highway is in Des Allemands, St. Charles Parish.

mi[2] km Destinations Notes
0.0 0.0 LA 631 (Old Spanish Trail)
0.3 0.5 LA 632 (Levee Road)
0.5 0.8 US 90
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


  1. ^ a b c Microsoft; Nokia (November 11, 2012). "Map of LA 631 and Auxiliary Route(s)" (Map). Bing Maps. Microsoft. Retrieved November 11, 2012. 
  2. ^ a b c Google (February 21, 2015). "Louisiana Highway 631 Spur" (Map). Google Maps. Google. Retrieved February 21, 2015. 

External links[edit]

Route map: Bing