Cowboy Churches are apparently affiliated with the Texas Southern Baptists. There are many Cowboy Churches in Texas and the movement is spreading.
This is the description from Wiki:
"Cowboy churches are local Christian churches within the cowboy culture that are distinctively "country" in character. A typical cowboy church may meet in a rural setting in a barn or old western building, have its own rodeo arena, and a country gospel band. Baptisms are generally done in a cattle tank."
This church was sitting in the middle of nowhere along the roadside of State Highway 83.