A world away from the bustling urban centers of Hidalgo County lie the two most sprawling parishes in the Diocese of Brownsville. St. Isidore Parish in San Isidro covers almost all of northern Starr County, while that of Immaculate Conception in McCook takes in a broad L-shaped tract in northern Hidalgo County from that community all the way to Linn, San Manuel and beyond. San Manuel is home to a third church, the mission church of St. Anne.