El Camino Real

The villages of the Adai at that time extended from the Red River southward beyond the Sabine into Texas, and the latter stream was known in the 18th century as Rio de los Adais. The trail between some of their villages became part of the road between Natchitoches and San Antonio, known variously as the “Contraband Trail,” San Antonio Trace, and El Camino Real, which passed through Los Adaes.
Dr. Clarence H. Webb
"The Belcher Mound, A Stratified Caddoan Site in Caddo Parish, Louisiana," Society for American Archaeology, 1959
Adai village on El Camino Real. 1718 Map, Library of Congress 98685735.
Adai village on El Camino Real on Rio de los Adiais, 2nd second village just to the south, and 3rd village at Los Adaes. 1777 Map of the Treaty of Paris 1763, Library of Congress 75691628.
El Camino Real Modern Map
El Camino Real Trail Information
The Adais came to settle along this buffalo trail (El Camino Real) near Spanish Lake. El Campti originated the meeting place on the great sandbar near Campti Louisiana, so that each fall all tribes of the Caddo Confederacy could come and trade.

De Vaca writes in the year 1530 that 'we were among the Adais' seeking directions. They were the first white men to travel westward over the buffalo trail.
Louis Raphael Nardini
No Man's Land: A History of the El Camino Real, 1961