The 2014 Southern California International Marimba Competition will be held from May 30-June 1st, 2014. The application process is to submit an audio recording via DropBox by March 1, 2014 which is a pretty innovative and easy way to apply.
The collegiate category does not require you to be in a college music program. There is also a duo category. It is open to all marimbists, so get practicing and apply! For more information head over to the SCIMC website.