A small college town located half way between Austin and San Antonio in central Texas. The main school there is Texas State, formerly known as South West Texas. Known to most people as just being as a ridiculous party school, TX State also has decent academics. San Marcos is 35-40 min from both Austin and San Antonio.
The good thing about San Marcos, other than the abundance of horny college chicks, is it's location near several rivers/lakes. During the long summers, you will find many people floating the Comal or Guadalupe rivers in San Marcos and New Braunfels. Lots of cold beer consumption is a must.