The Nueces River runs west to east across La Salle County, and at one time it served as the boundary between Texas and Mexico. The Treaty of Guadalupe Hidalgo, signed in 1848, ceded the Nueces Strip to Texas. La Salle County was formed out of some of this land in 1858. Early settlers struggled to survive in the wild terrain amid fears of attacks from outlaws and natives. From the Indian Raid of 1878 and the assassination of a sheriff, to droughts and dust storms, the hardy people of La Salle County persevered. After an election in 1883, Cotulla was selected as the permanent county seat, a courthouse was erected, and churches and schools were built. The lawlessness of the past is gone, but the county s residents share the perseverance of those early pioneers."