El Paso is a city in and the county seat of El Paso County, Texas, United States, and lies in West Texas. El Paso stands on the Rio Grande (Río Bravo del Norte), across the border from Ciudad Juárez, Chihuahua, Mexico. The Franklin Mountains extend into El Paso from the north and nearly divide the city into two sections, the western half forming the beginnings of the Mesilla Valley and with the eastern slopes connecting in the central business district at the south end of the mountain range.