http://krausesprings.net/location/ It's on Hwy 71 about 40 minutes northwest of Austin and well worth the drive. We spent the day on the rope swing and jumping off the 'cliff' into a deeper part of the pool. What a blast! If you're starting to think about summer family plans close to home, this is a good place to start.
David's Blog: Summer Road Trip Idea
A couple summers ago my family decided to 'swim' across Texas by hitting all the interesting swimming holes we could. One of the best was 'Krauss Springs.'