According to XConnect:
It’s once again time for American Idol auditions. Fox announced yesterday that tryouts for season 10 will begin Saturday, July 17th in Nashville, TN, and will subsequently hit Milwaukee, WI (July 21st), New Orleans, LA (July 26th), East Rutherford, NJ (August 3rd), Austin Texas (August, 11th) and San Francisco, CA (August 19th). In addition, in an effort to expand their talent pool, this year the eligibility age range has been changed, with 15-year-olds now allowed to audition. The maximum age remains 28.