For a access to a slalom course in Texas you need to join a private ski lake. Public lake skiing with a course just doesn't really exist in Texas unless you are in the "middle of no where". There used to be three semi-private courses on Lake Austin and between battling the bass boats and the Wallys pulling their kids through the course with a tube I finally gave up and bought a lot at Aquaplex. Don't get me wrong - I live on Lake Austin and I love where I live. I'll periodically free ski early in the morning cutting the fog and dodging ducks, swans, and this time of the year american coots (like a duck) but I mostly ski the course at Aquaplex.