During the week, after class ends around...5-ish i grab a bit, chit chat for a minute with fellow classmates, then I'm usually in the library from 6 to midnight. If I'm lucky, I get through the reading for 2 classes.
On the weekends, it will be typical for me to go in around 10am and stay until midnight. That's when I can usually get a little ahead in some of the readings or go back and read the concepts that I just went over in the E&E's or CrunchTime to make sure I'm getting it.
So you're not alone. everybody I know puts in crazy hours. The sad part is that even with all that, you still cannot cover every law, every case, every doctrine, etc.