I wish to travel to Canada, Mexico, or one of the islands (other than Cuba) adjacent to the United States. Can I return if my visa is expired?

Yes, in most cases. You can usually revalidate an expired visa automatically when returning from a visit of less than thirty days to Canada, Mexico, or one of the islands adjacent to the United States (other than Cuba) provided that you have a valid SEVIS Form I-20 and a valid unexpired Form I-94. This process is known as automatic visa revalidation. However, if you meet any one of following criteria, you will not be able to automatically revalidate your visa.  more