Some students are interested in colleges offering Equestrian programs, especially NCAA teams where they can compete at various levels.
If this is your focus, it is important to determine whether or not you will need boarding for your horse.
This book might be helpful:
Do you have a specialty? (e.g. dressage, horse ballet)
These colleges compete in the IHSA: http://www.ihsainc.com/CustomForms/CurrentTeams.aspx?List=Zone
Also check out: http://www.newhorse.com/page/horseboarding/b.510.html