 The city is on the mainland of Texas and is connected to Mustang Island (which contains the city of Port Aransas) via a -long causeway, and a free ferry that carries vehicles to the island.By Texas State Highway 35 and U.S. Route 181, Aransas Pass is northeast of Corpus Christi.According to the United States Census Bureau, the city of Aransas Pass has a total area of , of which is land and , or 75.99%, is covered by water.