**Exhibit 31.2**

 

I, Gary D. Gall,President, Chief Executive Officer, certify that:

 

1. I have reviewedthis quarterly report on Form 10-Q of Western Sierra Bancorp (the “Registrant”);

 

2. Based on myknowledge, this quarterly report does not contain any untrue statement of amaterial fact or omit to state a material fact necessary to make the statementsmade, in light of the circumstances under which such statements were made, notmisleading with respect to the period covered by this quarterly report;

 

3. Based on myknowledge, the financial statements, and other financial information includedin this quarterly report, fairly present in all material respects the financialcondition, results of operations and cash flows of the registrant as of, andfor, the periods presented in this quarterly report;

 

4. The registrant’sother certifying officer and I are responsible for establishing and maintainingdisclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and15d-15(e)) for the registrant and we have:

 

a) designed such disclosure controls andprocedures to ensure that material information relating to the registrant,including its consolidated subsidiaries, is made known to us by others withinthose entities, particularly during the period in which this quarterly reportis being prepared;

 

b) Designed such internal control over financialreporting, or caused such internal control over financial reporting to bedesigned under our supervision, to provide reasonable assurance regarding thereliability of financial reporting and the preparation of financial statementsfor external purposes in accordance with generally accepted accountingprinciples;

 

c) evaluated the effectiveness of the registrant’sdisclosure controls and procedures and presented in this report our conclusionsabout the effectiveness of the disclosure controls and procedures, as of theend of the period covered by this report based on such evaluation; and

 

d) Disclosed in this report any change in theregistrant’s internal control over financial reporting that occurred during theregistrant’s most recent fiscal quarter that has materially affected, or isreasonably likely to materially affect, the registrant’s internal control overfinancial reporting; and

 

5. The registrant’sother certifying officer and I have disclosed, based on our most recentevaluation of internal control over financial reporting,  to the registrant’s auditors and theaudit committee of registrant’s board of directors:

 

a) all significant deficiencies and materialweaknesses in the design or operation of internal control over financialreporting which are reasonably likely to adversely affect the registrant’sability to record, process, summarize and report financial information; and

 

b) any fraud, whetheror not material, that involves management or other employees who have asignificant role in the registrant’s internal control over financial reporting.

 

 
| Date: August 5, 2005 |                                   |              |
|---------------------------|----------------------------------------|-------------------|
|                      |                                   |              |
|                      |                                   | /s/ Gary D.  Gall |   |   |
|                      | President  and Chief Executive Officer |              |
|                           |                                        |                   |  |  |

 

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