I guess the title is no surprise to most everyone living here. But what makes this area so unique? The Hill Country makes up about half of the larger ecoregion known as the Edwards Plateau. The Edwards Plateau stretches from just north of San Antonio to as far north as Palo Pinto County just south of Ft Worth and from Austin and Waco in the east to the Pecos River on the west, an area of 36,680 square miles, or about 14% of the state of Texas.