At contact, Europeans found that Native American communities and regions were connected by trails. In Texas, the major trail was known to its colonizers as the Camino de los Tejas. Also known as Camino de Arriba and El Camino Real, and today as Texas 21, this road ran from Mexico northeast across Texas to the Caddo (Tejas) Indian settlements in eastern Texas and western Louisiana. The principal Caddo settlements were located at the road's intersection with streams and north-south trails. In the nineteenth century, this road was the major route followed westward to Texas by Anglo-American settlers.