CB Announces Q2 2013 Earnings Release Date

Columbia Banking System Announces Second Quarter 2013 Earnings Release
and Conference Call Date

Columbia Banking System, Inc. expects to report second quarter 2013 financial results on Thursday, July 25, 2013 at 6:15 a.m. Pacific Daylight Time.  Management will discuss these results on a conference call scheduled for that afternoon at 1:00 p.m. PDT (4:00 p.m. EDT). Interested parties may listen to this discussion by calling 1-866-378-3802; Conference ID code #16561845.

A conference call replay will be available from approximately 4:00 p.m. PDT on July 25, 2013 through midnight PDT on August 1, 2013.  The conference call replay can be accessed by dialing 1-855-859-2056 and entering Conference ID code #16561845.