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                                                                     Exhibit 4.2

                   COLUMBIA BANCORP 1999 STOCK INCENTIVE PLAN
                                 (AMENDED 2002)

      1. Purpose. The purpose of this 1999 Stock Incentive Plan (the "Plan") is
to enable Columbia Bancorp (the "Company") and its subsidiaries to attract and
retain experienced and able directors, officers, employees and other key
contributors and to provide an additional incentive to these individuals to
exert their best efforts for the Company, its subsidiaries and its shareholders.

      2. Administration.

      2.1 Board of Directors. The Plan shall be administered by the board of
directors of the Company (the "Board of Directors"), which shall determine and
designate from time to time the persons to whom grants and awards shall be made
and the amounts, terms and conditions of such grants and awards. Subject to the
provisions of the Plan, the Board of Directors may from time to time adopt or
amend rules and regulations relating to administration of the Plan, and the
interpretation and construction of the provisions of the Plan by the Board of
Directors shall be final and conclusive. Whenever the operation of the Plan
requires that the fair market value of the Company's common stock (the "Stock")
be determined, the fair market value shall be the closing price of the Stock as
quoted on the Nasdaq National Market on the date of the grant or award, or on
the next business day if the date of the grant or award is a holiday. No
employee who receives an option or other grant or award under the Plan shall
participate in the decision of the Board of Directors with respect to the grant
or award to that employee.

      2.2 Committee. The Board of Directors may delegate to a committee of the
Board of Directors (the "Committee") any or all authority for administration of
the Plan. If authority is delegated to a Committee, all references to the Board
of Directors in the Plan shall mean and relate to the Committee except (i) as
otherwise provided by the Board of Directors and (ii) that only the Board of
Directors may amend or terminate the Plan as provided elsewhere herein.

      3. Eligibility. Grants and awards may be made under the Plan to directors,
officers and key employees of the Company or any parent or subsidiary of the
Company, and other key individuals such as consultants to the Company who the
Board of Directors believes have made or will make an essential contribution to
the Company; provided, however, that only employees of the Company or its parent
or subsidiary corporations shall be eligible to receive Incentive Stock Options
under the Plan.

      4. Shares Subject to the Plan. Only common stock may be issued under the
Plan. The total number of shares of Stock that may be issued upon the exercise
of all options or pursuant to grants of rights or stock bonuses under the Plan
and under any prior stock incentive plans shall at no time exceed in the
aggregate ten percent (10%) of the Company's total issued and outstanding shares
of Stock. If any option under the Plan or stock appreciation right granted
without a related option expires or is canceled or terminated and is unexercised
in whole or in part, the shares allocable to the unexercised portion shall again
become available for awards under the Plan, except that shares that are issued
on exercise of a stock appreciation right that were allocable to an option, or
portion thereof, surrendered in connection with the exercise of the stock
appreciation right shall not again become available for awards under the Plan.
If Stock awarded as a bonus under the Plan is forfeited or repurchased pursuant
to applicable restrictions, the number of shares forfeited or purchased shall
again be available under the Plan. Stock issued under the Plan may be subject to
such restrictions on transfer, repurchase rights, or other restrictions as are
determined by the Board of Directors. Any certificates representing such Stock
shall bear such legends as are determined by the Board of Directors.

      5. Effective Date and Duration of Plan.

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      5.1 Effective Date. The Plan was adopted by a majority vote of the Board
of Directors on February 19, 1999 subject to shareholder approval, and shall
become effective (the "Effective Date") on the date when the Plan is approved by
a vote of a simple majority of the shareholders of the Company entitled to vote
on the matter. The approval of the Plan shall be submitted to shareholders for a
vote at the 1999 Annual Meeting of the Company. Options and stock appreciation
rights may be granted and Stock may be awarded as bonuses under the Plan at any
time after the Effective Date and before termination of the Plan.

      5.2 Duration of the Plan. The Plan shall continue until, in the aggregate,
options and stock appreciation rights have been granted and exercised and Stock
has been awarded as bonuses and the restrictions on any such Stock have lapsed
with respect to all shares subject to the Plan under paragraph 4 (subject to any
adjustments under paragraph 9). The Board of Directors may suspend or terminate
the Plan at any time except with respect to options, stock appreciation rights
and bonus rights, and Stock subject to restrictions then outstanding under the
Plan. Termination shall not affect any right of the Company to repurchase shares
or the forfeitability of shares issued under the Plan.

      6. Grants, Awards and Sales.

      6.1 Types of Securities. The Board of Directors may, from time to time,
take the following actions, separately or in combination, under the Plan: (i)
grant Incentive Stock Options, as defined in Section 422 of the Internal Revenue
Code of 1986, as amended (the "Code"); (ii) grant options other than Incentive
Stock Options (hereinafter "Non-Statutory Stock Options"); (iii) grant stock
appreciation rights or bonus rights; and (iv) award bonuses of Stock. The Board
of Directors shall specify the action taken with respect to each person granted
or awarded any option or Stock under the Plan and shall specifically designate
each option granted under the Plan as an Incentive Stock Option or a
Non-Statutory Stock Option.

      6.2 General Rules Relating to Options.

            6.2.1 Time of Exercise. Except as provided in paragraph 8, options
granted under the Plan may be exercised over the period stated in each option in
amounts and at times prescribed by the Board of Directors and stated in the
option, provided that options shall not be exercised for fractional shares. If
the optionee does not exercise an option in any period with respect o the full
number of shares to which the optionee is entitled in that period, he optionee's
rights shall be cumulative and the optionee may purchase those hares in any
subsequent period during the term of the option.

            6.2.2 Purchase of Shares. Shares may be purchased or acquired
pursuant to an option granted under the Plan only on receipt by the Company of
notice in writing from the optionee of the optionee's intention to exercise,
specifying the number of shares the optionee desires to purchase and the date on
which the optionee desires to complete the transaction, which may not be more
than 30 days after receipt of the notice. On or before the date specified for
completion of the purchase, the optionee must have paid the Company the full
purchase price in cash, including cash that may be the proceeds of a loan from
the Company, in shares of Stock previously acquired by the optionee valued at
fair market value, or in any combination of cash and shares of Stock. No shares
shall be issued until full payment therefor has been made. Each optionee who has
exercised an option shall, on notification of the amount due, if any, and prior
to or concurrently with delivery of the certificates representing the shares for
which the option was exercised, pay to the Company amounts necessary to satisfy
any applicable federal, state, and local withholding tax requirements. If
additional withholding becomes required beyond any amount deposited before
delivery of the certificates, the optionee shall pay such amount to the Company
on demand. If the employee fails to pay the amount demanded, the Company shall
have the right to withhold that amount from other amounts payable by the Company
to the optionee, including salary, subject to applicable law.

      6.3 Incentive Stock Options. Incentive Stock Options shall be subject to
the following additional terms

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and conditions:

            6.3.1 Limitation on Amount of Grants. No employee may be granted
Incentive Stock Options under the Plan such that the aggregate fair market value
on the date of grant of the Stock with respect to which Incentive Stock Options
are exercisable for the first time by that employee during any calendar year,
under the Plan and under any other incentive stock option plan (within the
meaning of Section 422 of the Code) of the Company or any parent or subsidiary
of the Company, exceeds $100,000.

            6.3.2 Option Price. The option price per share under each option
granted under the Plan shall be determined by the Board of Directors, but the
option price with respect to an Incentive Stock Option shall be not less than
100 percent of the fair market value of the shares covered by the option on the
date the option is granted.

            6.3.3 Duration of Options. Subject to paragraphs 6.3.4 and 8, each
option granted under the Plan shall continue in effect for the period fixed by
the Board of Directors, except that no Incentive Stock Option shall be
exercisable after the expiration of 10 years from the date it is granted.

            6.3.4 Limitations on Grants to 10 Percent Shareholders. An Incentive
Stock Option may be granted under the Plan to an employee of the Company, or of
any parent or subsidiary of the Company, possessing more than 10 percent of the
total combined voting power of all classes of stock of the Company, or of any
parent or subsidiary of the Company, only if the option price is at least 110
percent of the fair market value of the Stock subject to the option on the date
it is granted, and the option by its terms is not exercisable after the
expiration of five years from the date it is granted.

            6.3.5 Limitation on Time of Grant. No Incentive Stock Option may be
granted on or after the tenth anniversary of the Effective Date.

      6.4 Non-Statutory Stock Options. Non-Statutory Stock Options shall be
subject to the following additional terms and conditions:

            6.4.1 Option Price. The option price per share under each option
granted under the Plan shall be determined by the Board of Directors in its
discretion.

            6.4.2 Duration of Options. Non-Statutory Stock Options granted under
the Plan shall continue in effect for the period fixed by the Board of
Directors.

      6.5 Stock Bonuses. Stock awarded as a bonus shall be subject to the terms,
conditions, and restrictions determined by the Board of Directors at the time
the Stock is awarded as a bonus. The Board of Directors may require the
recipient to sign an agreement as a condition of the award, but may not require
the recipient to pay any money consideration except as provided in the last
sentence of this paragraph. The agreement may contain such terms, conditions,
representations, and warranties as the Board of Directors may require. The
Company may require any recipient of a Stock bonus to pay to the Company amounts
necessary to satisfy any applicable federal, state, or local tax withholding
requirements prior to delivery of certificates.

      6.6 Stock Appreciation Rights.

            6.6.1 Description. Each stock appreciation right shall entitle the
holder, on exercise, to receive from the Company in exchange therefor an amount
equal in value to the excess of the fair market value on the date of exercise of
one share of Stock over its fair market value on the date of grant (or, in the
case of a stock appreciation right granted in connection with an option, the
option price per share under the option to which the stock appreciation right
relates), multiplied by the number of shares covered by the stock appreciation
right or the option, or portion thereof, that is surrendered.

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            6.6.2 Exercise. A stock appreciation right shall be exercisable only
at the time or times established by the Board of Directors. If a stock
appreciation right is granted in connection with an option, then it shall be
exercisable only to the extent and on the same conditions that the related
option is exercisable. Upon exercise of a stock appreciation right, any option
or portion thereof to which the stock appreciation right relates must be
surrendered unexercised.

            6.6.3 Payment. Payment by the Company upon exercise of a stock
appreciation right may be made in shares of Stock valued at fair market value,
or in cash, or partly in Stock and partly in cash, as determined by the Board of
Directors. No fractional shares shall be issued upon exercise of a stock
appreciation right. In lieu thereof, cash may be paid in an amount equal to the
value of the fraction or, in the discretion of the Board of Directors, the
number of shares may be rounded to the next whole share.

            6.6.4 Adjustment. In the event of any adjustment pursuant to
paragraph 9 in the number of shares of Stock subject to an option granted under
the Plan, any stock appreciation right granted hereunder in connection with such
option shall be proportionately adjusted.

      6.7 Cash Bonus Rights.

            6.7.1 Grant. The Board of Directors may grant bonus rights under the
Plan in connection with: (i) an option or stock appreciation right granted or
previously granted, and (ii) Stock awarded, or previously awarded, as a bonus.
Bonus rights will be subject to such rules, terms, and conditions as the Board
of Directors may prescribe.

            6.7.2 Bonus Rights in Connection with Options and Stock Appreciation
Rights. A bonus right granted in connection with an option will entitle an
optionee to a cash bonus when the related option is exercised (or is surrendered
in connection with the exercise of a stock appreciation right related to the
option) in whole or in part. A bonus right granted in connection with a stock
appreciation right will entitle the holder to a cash bonus when the stock
appreciation right is exercised. Upon exercise of an option, the amount of the
bonus shall be determined by multiplying the excess of the total fair market
value of the shares to be acquired upon the exercise over the total option price
for the shares by the applicable bonus percentage. Upon exercise of a stock
appreciation right, the bonus shall be determined by multiplying the total fair
market value of the shares or cash received pursuant to the exercise of the
stock appreciation right by the applicable bonus percentage. The bonus
percentage applicable to a bonus right shall be determined from time to time by
the Board of Directors but shall in no event exceed 100 percent.

            6.7.3 Bonus Rights in Connection with Stock Bonus. A bonus right
granted in connection with Stock awarded as a bonus will entitle the person
awarded such Stock to a cash bonus either at the time the Stock is awarded or at
such time as restrictions, if any, to which the Stock is subject lapse. If Stock
awarded is subject to restrictions and is forfeited by the holder, the bonus
right granted in connection with such Stock shall terminate and may not be
exercised. The amount of cash bonus to be awarded and the time such cash bonus
is to be paid shall be determined from time to time by the Board of Directors.

            6.7.4 Bonus Rights in Connection with Stock Purchase. A bonus right
granted in connection with Stock purchased hereunder (excluding Stock purchased
pursuant to an option) shall terminate and may not be exercised in the event the
Stock is repurchased by the Company or forfeited by the holder pursuant to
restrictions applicable to the Stock. The amount of cash bonus to be awarded and
the time such cash bonus is to be paid shall be determined from time to time by
the Board of Directors.

      7. Nontransferability. Each option, stock appreciation right, or cash
bonus right granted under the Plan by its terms shall be nonassignable and
nontransferable by the holder except by will or by the laws of descent and
distribution of the state or country of the holder's domicile at the time of
death, and each option, stock

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appreciation right, or cash bonus right by its terms shall be exercisable during
the holder's lifetime only by the holder.

      8. Termination of Employment.

      8.1 Retirement or General Termination. Unless otherwise determined by the
Board of Directors, if an employee's employment by the Company or by any parent
or subsidiary of the Company is terminated by retirement or for any reason other
than in the circumstances specified in 8.2 below, any option, stock appreciation
right or cash bonus right held by the employee may be exercised at any time
prior to its expiration date or the expiration of three months after the date of
the termination, whichever is the shorter period, but only if and to the extent
the employee was entitled to exercise the option, stock appreciation right or
cash bonus right on the date of termination. The transfer of an employee by the
Company or any parent or subsidiary of the Company to the Company or any parent
or subsidiary of the Company shall not be considered a termination for purposes
of the Plan.

      8.2 Death or Disability. Unless otherwise determined by the Board of
Directors, if an employee's employment by the Company or by any parent or
subsidiary of the Company is terminated because of death or physical disability
(within the meaning of Section 22(e)(3) of the Code), any option, stock
appreciation right or cash bonus right held by the employee may be exercised at
any time prior to its expiration date or the expiration of one year after the
date of termination, whichever is the shorter period, for the greater of (a),
the number of remaining shares for which the employee was entitled to exercise
the option, stock appreciation right or cash bonus right on the date of
termination or (b) the number of remaining shares for which the employee would
have been entitled to exercise the option, stock appreciation right or cash
bonus right if such option or right had been 50 percent exercisable on the date
of termination. If an employee's employment is terminated by death, any option,
stock appreciation right or cash bonus right held by the employee shall be
exercisable only by the person or persons to whom the employee's rights under
the option, stock appreciation right or cash bonus right pass by the employee's
will or by the laws of descent and distribution of the state or country of the
employee's domicile at the time of death.

      8.3 Termination of Unexercised Rights. To the extent an option, stock
appreciation right or cash bonus right held by any deceased employee or by any
employee whose employment is terminated is not exercised within the limited
periods provided above, all further rights to exercise the option, stock
appreciation right or cash bonus right shall terminate at the expiration of such
periods.

      8.4 Termination of Non-Employees. With respect to options, stock
appreciation rights and cash bonus rights granted to persons who are not
employees of the Company or its parents or subsidiaries, the Board of Directors
may establish provisions relating to the termination of those persons' status
with the Company or its parents or subsidiaries.

      9. Changes in Capital Structure. If the outstanding shares of Stock are
increased or decreased or changed into or exchanged for a different number or
kind of shares or other securities of the Company or of another corporation, by
reason of any reorganization, merger, consolidation, plan of exchange,
recapitalization, reclassification, stock split, combination of shares, or
dividends payable in shares, appropriate adjustment shall be made by the Board
of Directors in the number and kind of shares for the purchase of which options
or stock appreciation rights may be granted and for which Stock may be awarded
as bonuses subject to restrictions under the Plan. In addition, the Board of
Directors shall make appropriate adjustments in the number and kind of shares as
to which outstanding options, or portions thereof then unexercised, shall be
exercisable, and the number and kind of shares covered by outstanding stock
appreciation rights to the end that each optionee's proportionate interest shall
be maintained as before the occurrence of such event. Adjustments in outstanding
options shall be made without change in the total price applicable to the
unexercised portion of any option and with a corresponding adjustment in the
option price per share. Adjustments in outstanding stock appreciation rights
shall be made without change in their total value. Any such adjustment made by
the Board of Directors

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shall be conclusive. In the event of dissolution or liquidation of the Company
or a merger, consolidation, or plan of exchange affecting the Company, in lieu
of making adjustments as provided for above in this paragraph 9, the Board of
Directors may, in its sole discretion, provide a 30-day period prior to such
event during which optionees shall have the right to exercise options or stock
appreciation rights.

      10. Corporate Mergers, Acquisitions, Etc. The Board of Directors may grant
options and stock appreciation rights having terms and provisions which vary
from those specified in this Plan provided that any options and stock
appreciation rights granted pursuant to this section are granted in substitution
for, or in connection with the assumption of, existing options and stock
appreciation rights granted by another corporation and assumed or otherwise
agreed to be provided for by the Company pursuant to or by reason of a
transaction involving a corporate merger, consolidation, acquisition of property
or stock, separation, reorganization or liquidation to which the Company or a
parent or subsidiary is a party.

      11. Amendment of Plan. The Board of Directors may amend the Plan in such
respects as it deems advisable because of changes in the law while the Plan is
in effect or for any other reason. Such amendments may include, without
limitation, an increase in the total number of shares that may be issued under
the Plan, and changes to the classes of persons eligible to receive awards or
grants under the Plan. No amendment to the Plan shall be made without
shareholder approval if such approval is necessary to comply with any regulatory
requirement, or if the Board of Directors deems the submission of the amendment
to shareholders for approval is desirable or appropriate. Without limitation of
the foregoing, shareholder approval shall be required for any amendment
increasing the total number of shares that may be issued under the Plan. Except
as may be required by applicable law, no amendment to the Plan shall affect or
change an option or stock appreciation right granted to any person prior to such
amendment without the written consent of such person.

      12. Prior Plans. The Plan supersedes and replaces any prior plans of the
Company permitting or relating to the award of stock options, the grant of stock
bonuses, or the issuance of any other kinds of stock-based incentive
compensation described in the Plan; provided, that the adoption and approval of
the Plan shall not affect grants and awards made under any such prior plans or
the rights of recipients of such grants and awards, all of which such prior
grants and awards shall be and are deemed affirmed and ratified.

      13. Approvals. The obligations of the Company under the Plan may be
subject to the approval of state and federal authorities or agencies with
jurisdiction in the matter. The Company will use its best efforts to take steps
required by state or federal law or applicable regulations in connection with
the granting of any option or the issuance or sale of any shares under the Plan.
The foregoing notwithstanding, the Company shall not be obligated to issue or
deliver shares of Stock under the Plan if the Company is advised by its legal
counsel that such issuance or delivery would violate applicable state or federal
laws.

      14. Employment Rights. Nothing in the Plan or any grant or award made
pursuant to the Plan shall confer on any employee any right to be continued in
the employment of the Company or any parent or subsidiary of the Company, or
shall interfere in any way with the right of the Company or any parent or
subsidiary of the Company by whom such employee is employed to terminate such
employee's employment at any time, with or without cause.

      15. Rights as a Shareholder. A holder of an option or a stock appreciation
right or a recipient of Stock awarded as a bonus shall have no rights as a
shareholder with respect to any shares covered by any option, stock appreciation
right, or bonus award until the date of issue of a stock certificate to him or
her for such shares. Except as otherwise provided in the Plan, no adjustment
shall be made for dividends or other rights for which the record date is prior
to the date such stock certificate is issued.

           Date of Adoption by Board of Directors: February 19, 1999.

                   Shareholder Approval Date: April 16, 1999.

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                                AMENDMENT HISTORY

      At the April 25, 2002, Annual Meeting of Columbia Bancorp shareholders,
the following amendment to a Section 4 was approved. (New text shown in bold.)

      4. Shares Subject to the Plan. Only common stock may be issued under the
Plan. The total number of shares of Stock that may be issued upon the exercise
of all options or pursuant to grants of rights or stock bonuses under the Plan
AND UNDER ANY PRIOR STOCK INCENTIVE PLANS shall at no time exceed in the
aggregate [four percent (4%)] TEN PERCENT (10%) of the Company's total issued
and outstanding shares of Stock. * * *