Exhibit 99.1

               Columbia Bancorp Announces Early Guidance
                   for Second Quarter 2003 Earnings


    THE DALLES, Ore.--(BUSINESS WIRE)--June 11, 2003--Columbia Bancorp
(Nasdaq:CBBO) today provided early guidance for earnings in the second
quarter 2003. The second quarter's diluted earnings per share is
forecast to be within a range of $0.15 to $0.17 per share as a result
of a loan loss provision expense and a mortgage servicing asset
valuation adjustment.
    Columbia Bancorp's subsidiary, Columbia River Bank, will take a
loan loss provision totaling $1.7 million in the second quarter to
cover growth in the loan portfolio, miscellaneous loan losses and the
write-down on one large credit which has been classified as a
non-performing asset. This problem loan in the amount of $2,821,718
was disclosed previously during our first quarter release and has
since been on non-accrual status. The property, secured by commercial
real estate in Central Oregon, was initially appraised for $3,150,000
and carries the guarantee of a government agency, which is currently
in dispute. A recent independent appraisal valued the property at
$1,500,000. Therefore, a write-down of the loan was necessary in the
amount of $1,461,718. The increased loan loss provision will cover the
write-down while the Bank continues to pursue collection of this debt
through liquidation of collateral and resolution of the guarantee.
Management believes this loss to represent an isolated event, and that
the Bank's overall credit quality remains otherwise sound.
    During the first week of June 2003, management determined that the
fair value of the mortgage-servicing asset (MSA) exceeded its book
value by approximately $550,000 to $600,000, and that recognition of a
valuation adjustment to our recorded MSA would be necessary. Under the
current rate environment, the MSA multiple will be valued within a
range of 0.77 to 0.79 percent as a percentage of total loans serviced.
The decline in fair value occurred because market values for mortgage
servicing assets have declined significantly during 2003. The falling
mortgage interest rate environment has resulted in a significant
number of borrowers taking advantage of falling mortgage rates by
refinancing their mortgage loans. The result of the higher than normal
refinance boom increased the constant prepayment rate (CPR) figures
that are used, in part, to establish the value of the
mortgage-servicing assets. The result of declining interest rates and
higher than usual CPRs has contributed significantly to the change in
value of the Bank's mortgage servicing asset. Our strategy for
mitigating future adjustments will be accomplished through our
expanded distribution channels in the retail and wholesale mortgage
markets. Management believes that increased loan production will
sustain the mortgage-servicing asset and mitigate the impact of
valuation adjustments in future periods.

    About Columbia Bancorp

    Columbia Bancorp (www.columbiabancorp.com) is the financial
holding company for Columbia River Bank, which operates 17 branches
located in The Dalles (2), Hood River, Bend (3), Madras, Redmond,
Pendleton, Hermiston, McMinnville (3), Canby and Newberg, Oregon, and
in Goldendale and White Salmon, Washington. To supplement its
community banking services, Columbia River Bank also provides
mortgage-lending services through its Columbia River Bank Mortgage
Group and brokerage services through its affiliation with CRB
Financial Services.

    Forward-looking statements with respect to the financial
condition, results of operations and the business of Columbia are
subject to certain risks and uncertainties that could cause actual
results to differ materially from those set forth in such statements.
These include, without limitation, Columbia's ability to manage new
and acquired branches, the impact of competition on revenues and
margins, and other risks and uncertainties, including statements
relating to the year 2003, as may be detailed from time to time in
Columbia's public announcements and filings with the SEC.
Forward-looking statements can be identified by the use of
forward-looking terminology, such as "may", "will", "should",
"expect", "anticipate", "estimate", "continue", "plans", "intends", or
other similar terminology. Columbia does not intend to publicly
release any revisions to these forward-looking statements to reflect
events or circumstances after the date of this release, other than in
its periodic filings with the SEC, or to reflect the occurrence of
unanticipated events.


    CONTACT: Columbia Bancorp
             Roger L. Christensen, 541/298-6633
             Greg B. Spear, 541/298-6612