FIRST NORTHERN BANK OF DIXON
                             1997 STOCK OPTION PLAN





                                TABLE OF CONTENTS
                                -----------------

                                                                            Page
                                                                            ----


SECTION 1.        ESTABLISHMENT AND PURPOSE....................................1

SECTION 2.        DEFINITIONS..................................................1
         (a)      Board of Directors...........................................1
         (b)      Change in Control............................................1
         (c)      Code.........................................................2
         (d)      Committee....................................................2
         (e)      Company......................................................2
         (f)      Employee.....................................................2
         (g)      Exchange Act.................................................2
         (h)      Exercise Price...............................................2
         (i)      Fair Market Value............................................2
         (j)      ISO..........................................................2
         (k)      Nonstatutory Option..........................................2
         (l)      Option.......................................................2
         (m)      Optionee.....................................................2
         (n)      Outside Director.............................................3
         (o)      Plan.........................................................3
         (p)      Service......................................................3
         (q)      Share........................................................3
         (r)      Stock........................................................3
         (s)      Stock Option Agreement.......................................3
         (t)      Subsidiary...................................................3
         (u)      Total and Permanent Disability...............................3

SECTION 3.        ADMINISTRATION...............................................3
         (a)      Committee Procedures.........................................3
         (b)      Committee Responsibilities...................................3

SECTION 4.        ELIGIBILITY..................................................4
         (a)      General Rule.................................................4
         (b)      Limitation On Grants.........................................4
         (c)      Ten-Percent Shareholders.....................................5
         (d)      Attribution Rules............................................5
         (e)      Outstanding Stock............................................5

SECTION 5.        STOCK SUBJECT TO PLAN........................................5
         (a)      Basic Limitation.............................................5
         (b)      Additional Shares............................................5

SECTION 6.        TERMS AND CONDITIONS OF OPTIONS..............................5
         (a)      Stock Option Agreement.......................................5
         (b)      Number of Shares.............................................5
         (c)      Exercise Price...............................................5
         (d)      Withholding Taxes............................................6

                                      -i-



         (e)      Exercisability and Term......................................6
         (f)      Nontransferability...........................................6
         (g)      Exercise of Options Upon Termination of Service..............6
         (h)      No Rights as a Stockholder...................................6
         (i)      Modification, Extension and Renewal of Options...............6
         (j)      Restrictions on Transfer of Shares...........................7

SECTION 7.        PAYMENT FOR SHARES...........................................7
         (a)      General Rule.................................................7
         (b)      Surrender of Stock...........................................7

SECTION 8.        ADJUSTMENT OF SHARES.........................................7
         (a)      General......................................................7
         (b)      Reorganizations..............................................7
         (c)      Reservation of Rights........................................7

SECTION 9.        LEGAL AND REGULATORY REQUIREMENTS............................8

SECTION 10.       NO EMPLOYMENT RIGHTS.........................................8

SECTION 11.       DURATION AND AMENDMENTS......................................8
         (a)      Term of the Plan.............................................8
         (b)      Right to Amend or Terminate the Plan.........................8
         (c)      Effect of Amendment or Termination...........................8

SECTION 12.       EXECUTION...................................................9

                                      -ii-




                          FIRST NORTHERN BANK OF DIXON
                             1997 STOCK OPTION PLAN


     SECTION 1. ESTABLISHMENT AND PURPOSE.
     ---------- --------------------------

     The  Plan  is  being   established  to  offer  selected  key  employees  an
opportunity to acquire a proprietary  interest in the success of the Company, or
to increase such interest,  by purchasing  Shares of the Company's Common Stock.
The Plan provides for the grant of Options to purchase  Shares.  Options granted
under the Plan may  include  Nonstatutory  Options as well as ISOs  intended  to
qualify under Code section 422.

     SECTION 2. DEFINITIONS.
     ---------- ------------

     (a) "Board of Directors"  shall mean the Board of Directors of the Company,
          ------------------
as constituted from time to time.

     (b) "Change in Control"  shall mean the  occurrence of any of the following
         -----------------
events:

          (i)  Approval  by  the   shareholders   of  the  Company  of  a
     merger  or consolidation  of the Company with or into another entity or any
     other corporate reorganization, if either:

               (A) The Company is not the continuing or surviving entity; or

               (B) More than 50% of the combined voting power of the Company's
          securities outstanding immediately after such merger, consolidation or
          other reorganization is owned by persons who were not shareholders of
          the Company  immediately  prior to such merger, consolidation or other
          reorganization;

          (ii) A change in the composition of the Board of Directors,  as a
     result of which fewer than on-half of the incumbent directors are directors
     who either:

               (A) Had been directors of the Company 24 months prior to such
          change; or

               (B) Were elected, or nominated for election, to the Board of
          Directors with the affirmative votes of at least a majority of the
          directors who had been directors of the Company 24 months prior to
          such change and who were still in office at the time of the election
          or nomination; or

          (iii) Any "person" (as such term is used in sections 13(d) and 14(d)
     of the Exchange Act) by the acquisition or aggregation of securities is or
     becomes the beneficial owner, directly or indirectly, of securities of the
     Company representing 25% or more of the combined voting power of the
     Company's then

                                      -1-



     outstanding  securities  ordinarily  (and apart from rights  accruing under
     special  circumstances)  having the right to vote at elections of directors
     (the "Base  Capital  Stock");  except  that any  change  in the  relative
     beneficial ownership of the  Company's  securities  by any person  result-
     ing  solely from a reduction in the aggregate  number of outstanding shares
     of Base Capital Stock, and any decrease thereafter in such person's owner-
     ship of securities,  shall be disregarded  until such person increases in
     any manner,  directly or indirectly, such person's beneficial ownership of
     any securities of the Company.

     (c) "Code" shall mean the Internal Revenue Code of 1986, as amended.
          ----

     (d)  "Committee"  shall  mean  the  committee  designated  by the  Board of
           ---------
Directors,  which is authorized  to administer  the Plan under Section 3 hereof.
The  Committee  shall have  membership  composition  which  enables  the Plan to
qualify  under Rule 16b-3  with  regard to the grant of Options or other  rights
under the Plan to persons who are subject to Section 16 of the Exchange Act.

     (e) "Company"  shall mean the First  Northern  Bank of Dixon,  a California
          -------
corporation.

     (f) "Employee"  shall mean any  individual who is a common-law  employee of
          --------
the Company or of a Subsidiary.  "Employee"  shall not include an individual who
is an Outside Director.

     (g)  "Exchange  Act" shall mean the  Securities  Exchange  Act of 1934,  as
           -------------
amended.

     (h)  "Exercise  Price"  shall  mean the  amount  for which one Share may be
           ---------------
purchased  upon  exercise of an Option,  as  specified  by the  Committee in the
applicable Stock Option Agreement.

     (i) "Fair Market  Value" shall mean (i) the closing price of a Share on the
          ------------------
principal  exchange  which the  Shares are  trading,  on the first  trading  day
immediately preceding the date on which the Fair Market Value is determined,  or
(ii) if the Shares are not  traded on an  exchange  but are quoted on the Nasdaq
National Market or a successor  quotation system, the closing price on the first
trading day  immediately  preceding  the date on which the Fair Market  Value is
determined,  or (iii) if the Shares are not traded on an  exchange  or quoted on
the Nasdaq  National  Market or a successor  quotation  system,  the fair market
value  of  a  Share,  as  determined  by  the  Committee  in  good  faith.  Such
determination shall be conclusive and binding on all persons.

     (j) "ISO" shall mean an employee  incentive stock option  described in Code
          ---
section 422.

     (k)  "Nonstatutory  Option" shall mean an employee stock option that is not
           --------------------
an ISO.

     (l) "Option"  shall mean an ISO or  Nonstatutory  Option  granted under the
          ------
Plan and entitling the holder to purchase Shares.

     (m) "Optionee" shall mean an individual who holds an Option.
          --------

                                      -2-


     (n) "Outside Director" shall mean a member of the Board of Directors who is
          ----------------
not a common-law employee of the Company or of a Subsidiary.

     (o) "Plan" shall mean this First  Northern  Bank of Dixon 1997 Stock Option
          ----
Plan, as amended from time to time.

     (p) "Service" shall mean service as an Employee.
          -------

     (q) "Share" shall mean one share of Stock, as adjusted in accordance with
          -----
Section 8 (if applicable).

     (r) "Stock" shall mean the Common Stock of the Company.
          -----

     (s) "Stock Option  Agreement" shall mean the agreement  between the Company
          -----------------------
and an Optionee which contains the terms, conditions and restrictions pertaining
to his Option.

     (t) "Subsidiary"  shall mean any corporation,  if the Company and/or one or
          ----------
more  other  Subsidiaries  own not less than  fifty  percent  (50%) of the total
combined voting power of all classes of outstanding stock of such corporation. A
corporation that attains the status of a Subsidiary on a date after the adoption
of the Plan shall be considered a Subsidiary commencing as of such date.

     (u) "Total and Permanent Disability" shall mean that the Optionee is unable
          ------------------------------
to work.  Total and Permanent  Disability  shall be determined by the Company in
accordance with its Long Term Disability Plan.

     SECTION 3. ADMINISTRATION.
     ---------- ---------------

     (a) Committee Procedures. The Board of Directors shall designate one of the
         --------------------
members of the  Committee as chairman.  The  Committee may hold meetings at such
times and places as it shall determine.  The acts of a majority of the Committee
members  present at meetings  at which a quorum  exists,  or acts  reduced to or
approved  in  writing  by all  Committee  members,  shall be  valid  acts of the
Committee.

     (b) Committee Responsibilities.  Subject to the provisions of the Plan, the
         --------------------------
Committee  shall  have  full  authority  and  discretion  to take the  following
actions:

          (i)   To interpret the Plan and to apply its provisions;

          (ii)  To adopt, amend or rescind rules, procedures and forms relating
     to the Plan;

          (iii) To authorize  any person to execute,  on behalf of the  Company,
     any instrument required to carry out the purposes of the Plan;

          (iv)  To determine when Options are to be granted under the Plan;

          (v)   To select the Optionees;

                                      -3-


           (vi) To determine the number of Shares to be made subject to each
     Option;

          (vii)  To prescribe the terms and conditions of each Option, including
     (without  limitation)  the Exercise  Price,  the vesting or duration of the
     Option (including  accelerating the vesting of the Option), to determine
     whether such Option is to be classified as an ISO or as a  Nonstatutory
     Option,  and to specify the  provisions of the Stock Option  Agreement
     relating to such Option; (viii) To amend any outstanding Stock Option
     Agreement, subject to applicable legal restrictions and to the consent of
     the Optionee who entered into such agreement;

          (ix)   To prescribe the consideration for the grant of each Option
     under the Plan and to determine the sufficiency of such consideration;

          (x)    To determine the disposition of each Option under the Plan in
     accordance with any domestic relations order in the event of an Optionee's
     divorce or dissolution of marriage;

          (xi)   To determine whether Options under the Plan will be granted in
     replacement of other grants under an incentive or other compensation plan
     of an acquired business;

          (xii)  To correct any defect, supply any omission, or reconcile any
     inconsistency in the Plan or any Stock Option Agreement; and

          (xiii) To take any other actions deemed necessary or advisable for the
     administration of the Plan.

Subject to the  requirements of applicable law, the Committee may designate
persons  other than members of the  Committee to carry out its  responsibilities
and may prescribe such  conditions and  limitations as it may deem  appropriate,
except that the  Committee  may not  delegate its  authority  with regard to the
selection  for  participation  of or the  granting of Options  under the Plan to
persons   subject  to  Section  16  of  the   Exchange   Act.   All   decisions,
interpretations and other actions of the Committee shall be final and binding on
all Optionees and all persons deriving their rights from an Optionee.  No member
of the Committee  shall be liable for any action that he has taken or has failed
to take in good faith with  respect to the Plan or any Option to acquire  Shares
under the Plan.

     SECTION 4.     ELIGIBILITY.
                    ------------

     (a) General  Rule.  Only  Employees  shall be eligible for  designation  as
         -------------
Optionees by the Committee.  In addition,  only  individuals who are employed as
common-law  employees by the Company or a  Subsidiary  shall be eligible for the
grant of ISOs.

     (b) Limitation On Grants.  No Employee shall be granted Options to purchase
         --------------------
Shares during any fiscal year covering in excess of 25,000 Shares.

                                      -4-



     (c)  Ten-Percent  Shareholders.  An Employee who owns more than ten percent
          -------------------------
(10%) of the total combined voting power of all classes of outstanding  stock of
the Company or any of its Subsidiaries shall not be eligible for the grant of an
ISO unless such grant satisfies the requirements of Code section 422(c)(5).

     (d) Attribution Rules. For purposes of Subsection (c) above, in determining
         -----------------
stock ownership, an Employee shall be deemed to own the stock owned, directly or
indirectly,  by or for his  brothers,  sisters,  spouse,  ancestors  and  lineal
descendants.  Stock  owned,  directly or  indirectly,  by or for a  corporation,
partnership,  estate or trust shall be deemed to be owned  proportionately by or
for its shareholders, partners or beneficiaries.

     (e) Outstanding  Stock. For purposes of Subsection (c) above,  "outstanding
         ------------------
stock" shall include all stock actually issued and outstanding immediately after
the grant.  "Outstanding stock" shall not include shares authorized for issuance
under outstanding options held by the Employee or by any other person.

     SECTION 5. STOCK SUBJECT TO PLAN.
     ---------- ----------------------

     (a) Basic Limitation. Shares offered under the Plan shall be authorized but
         ----------------
unissued  Shares.  The aggregate  number of Shares which may be issued under the
Plan upon  exercise  of Options  shall not  exceed  250,000  Shares,  subject to
adjustment  pursuant  to Section 8. The  number of Shares  which are  subject to
Options  outstanding  at any time  under the Plan shall not exceed the number of
Shares which then remain  available  for issuance  under the Plan.  The Company,
during  the term of the Plan,  shall at all  times  reserve  and keep  available
sufficient Shares to satisfy the requirements of the Plan.

     (b) Additional  Shares.  In the event that any  outstanding  Option for any
         ------------------
reason expires or is canceled or otherwise  terminated,  the Shares allocable to
the unexercised portion of such Option shall again be available for the purposes
of the Plan.

     SECTION 6.  TERMS AND CONDITIONS OF OPTIONS.
     ----------  --------------------------------

     (a) Stock Option Agreement. Each grant of an Option under the Plan shall be
         ----------------------
evidenced by a Stock Option Agreement between the Optionee and the Company. Such
Option shall be subject to all  applicable  terms and conditions of the Plan and
may be subject to any other terms and conditions which are not inconsistent with
the Plan and which the  Committee  deems  appropriate  for  inclusion in a Stock
Option Agreement.  The provisions of the various Stock Option Agreements entered
into under the Plan need not be identical.

     (b) Number of Shares.  Each Stock Option Agreement shall specify the number
         ----------------
of Shares that are subject to the Option and shall provide for the adjustment of
such number in accordance with Section 8. The Stock Option  Agreement shall also
specify whether the Option is an ISO or a Nonstatutory Option.

     (c) Exercise Price.  Each Stock Option Agreement shall specify the Exercise
         --------------
Price.  The Exercise  Price of an ISO shall not be less than one
hundred percent (100%) of the Fair Market Value of a Share on the date of grant,
except as otherwise provided in Section 4(c). Subject to the preceding sentence,
the Exercise Price under any Option shall be determined by

                                      -5-



the Committee at its sole  discretion.  The Exercise Price shall be payable
in one of the forms described in Sections 7(a) and (b).

     (d)  Withholding  Taxes.  As a condition to the exercise of an Option,  the
          ------------------
Optionee  shall make such  arrangements  as the  Committee  may  require for the
satisfaction of any federal, state or local withholding tax obligations that may
arise in  connection  with such  exercise.  The  Optionee  shall  also make such
arrangements  as the Committee may require for the  satisfaction of any federal,
state or local withholding tax obligations that may arise in connection with the
disposition of Shares acquired by exercising an Option.  An Optionee may satisfy
all or part of his or her  withholding  or income tax  obligations by having the
Company  withhold all or a portion of any Shares that otherwise  would be issued
to him or her or by  surrendering  all or a portion of any Shares that he or she
previously  acquired.  Such Shares shall be valued at their Fair Market Value on
the date when taxes otherwise would be withheld in cash. Any payment of taxes by
assigning  Shares to the Company may be subject to  restrictions  imposed by the
Committee.

     (e)  Exercisability and Term. Options shall be exercisable within the times
          -----------------------
or upon the events  determined by the Committee as set forth in the Stock Option
Agreement.  Options shall become fully  exercisable  as to all Shares subject to
such Option in the event that a Change in Control  takes  place with  respect to
the  Company.  Subject to the  preceding  sentence,  the  Committee  at its sole
discretion shall determine when all or any installment of an Option is to become
exercisable and when the Option is to expire; provided, however that the term of
any ISO shall not exceed ten (10) years.

     (f) Nontransferability. During an Optionee's lifetime, his or her Option(s)
         ------------------
shall be exercisable  only by him or her and shall not be  transferable,  unless
the Option agreement  otherwise  provides.  In the event of an Optionee's death,
his or her Option(s) shall not be transferable  other than by will,  beneficiary
designation or by the laws of descent and distribution.

     (g)  Exercise of Options  Upon  Termination  of Service.  Each Stock Option
          --------------------------------------------------
Agreement  shall set forth the extent to which the Optionee shall have the right
to exercise the Option following  termination of the Optionee's Service with the
Company  and its  Subsidiaries,  and the  right to  exercise  the  Option of any
executors  or  administrators  of the  Optionee's  estate or any  person who has
acquired such Option(s)  directly from the Optionee by beneficiary  designation,
bequest  or  inheritance.  Such  provisions  shall  be  determined  in the  sole
discretion  of the  Committee,  need not be  uniform  among all  Options  issued
pursuant  to the Plan,  and may  reflect  distinctions  based on the reasons for
termination of Service.

     (h)  No  Rights  as a  Stockholder.  An  Optionee,  or a  transferee  of an
          -----------------------------
Optionee,  shall  have no rights as a  stockholder  with  respect  to any Shares
covered by his Option until the date of the issuance of a stock  certificate for
such Shares. No adjustments shall be made, except as provided in Section 8.

     (i) Modification, Extension and Renewal of Options. Within the limitations
         -----------------------------------------------
of the Plan,  the  Committee  may cancel,  modify,  extend or renew  outstanding
Options or may accept the cancellation of outstanding Options (to the extent not
previously  exercised)  in return for the grant of new  Options at the same or a
different price. The foregoing notwithstanding, no modification

                                      -6-



of an Option shall, without the consent of the Optionee, impair his rights or
increase his obligations under such Option.

     (j) Restrictions on Transfer of Shares.  Any Shares issued upon exercise of
         ----------------------------------
an Option  shall be subject to such  special  forfeiture  conditions,  rights of
repurchase,  rights of first  refusal  and other  transfer  restrictions  as the
Committee may determine.  Such restrictions shall be set forth in the applicable
Stock Option  Agreement and shall apply in addition to any general  restrictions
that may apply to all holders of Shares.

     SECTION 7.  PAYMENT FOR SHARES.
     ----------  -------------------

     (a) General Rule. The entire Exercise Price of Shares issued under the Plan
         ------------
shall be  payable in lawful  money of the  United  States of America at the time
when such options are exercised, except as provided in Subsection (b) below.

     (b)  Surrender  of Stock.  To the extent that a Stock  Option  Agreement so
          -------------------
provides, payment may be made all or in part with Shares which have already been
owned by the Optionee or his  representative for more than the maximum number of
months  required by the  Committee and which are  surrendered  to the Company in
good form for  transfer.  Such Shares shall be valued at their Fair Market Value
on the date when the new Shares are purchased under the Plan.

     SECTION 8.  ADJUSTMENT OF SHARES.
     ----------  ---------------------

     (a) General.  In the event of a subdivision  of the  outstanding  Stock,  a
         -------
declaration of a dividend payable in Shares, a declaration of a dividend payable
in a form other than Shares in an amount that has a material effect on the value
of  Shares,  a  combination  or  consolidation  of  the  outstanding  Stock  (by
reclassification   or   otherwise)   into  a  lesser   number   of   Shares,   a
recapitalization or a similar  occurrence,  the Committee shall make appropriate
adjustments  in one or more of (i) the  number of Shares  available  for  future
grants under  Section 5, (ii) the number of Shares  covered by each  outstanding
Option or (iii) the Exercise Price under each outstanding Option.

     (b)  Reorganizations.  In the event that the Company is a party to a merger
          ---------------
or other  reorganization,  outstanding Options shall be subject to the agreement
of merger or  reorganization.  Such  agreement may provide for the assumption of
outstanding  Options  by the  surviving  corporation  or its parent or for their
continuation  by the  Company  (if  the  Company  is a  surviving  corporation);
provided, however, that if assumption or continuation of the outstanding Options
is not provided by such  agreement  then the Committee  shall have the option of
offering the payment of a cash  settlement  equal to the difference  between the
amount to be paid for one Share under such agreement and the Exercise  Price, in
all cases without the Optionees' consent.

     (c)  Reservation  of  Rights.  Except as  provided  in this  Section  8, an
          -----------------------
Optionee shall have no rights by reason of any subdivision or  consolidation  of
shares of stock of any class,  the payment of any dividend or any other increase
or  decrease  in the  number of shares of stock of any  class.  Any issue by the
Company of shares of stock of any class, or securities  convertible  into shares
of stock of any class,  shall not affect,  and no adjustment  by reason  thereof
shall be made with respect to, the number or Exercise Price of Shares subject to
an Option.  The grant of an Option  pursuant to the Plan shall not affect in any
way the right or power of the  Company to

                                      -7-




make  adjustments,  reclassifications,  reorganizations  or  changes of its
capital  or  business  structure,  to  merge  or  consolidate  or  to  dissolve,
liquidate, sell or transfer all or any part of its business or assets.

     SECTION 9.  LEGAL AND REGULATORY REQUIREMENTS.
     ----------  ----------------------------------

     Shares  shall not be issued under the Plan unless the issuance and delivery
of such Shares complies with (or is exempt from) all applicable  requirements of
law, including (without  limitation) the Securities Act of 1933, as amended, the
rules  and  regulations  promulgated  thereunder,   state  securities  laws  and
regulations  and the  regulations  of any stock  exchange on which the Company's
securities  may then be listed,  and the Company has  obtained  the  approval or
favorable  ruling from any governmental  agency which the Company  determines is
necessary or advisable.

     SECTION 10.  NO EMPLOYMENT RIGHTS.
     -----------  ---------------------

     No provision of the Plan, nor any Option  granted under the Plan,  shall be
construed to give any person any right to become, to be treated as, or to remain
an Employee. The Company and its Subsidiaries reserve the right to terminate any
person's Service at any time and for any reason.

     SECTION 11.  DURATION AND AMENDMENTS.
     -----------  ------------------------

     (a) Term of the Plan. The Plan, as set forth herein, shall become effective
         ----------------
as of the date  set  forth  below,  subject  to the  approval  of the  Company's
stockholders. In the event that the stockholders fail to approve the Plan within
twelve (12) months of its adoption by the Board of Directors,  any Option grants
already made shall be null and void,  and no  additional  Option grants shall be
made after such date.  The Plan  shall  terminate  automatically  ten (10) years
after its original  adoption by the Board of Directors  and may be terminated on
any earlier date pursuant to Subsection (b) below.

     (b) Right to Amend or Terminate the Plan.  The Board of Directors may amend
         ------------------------------------
the Plan at any time and from time to time.  Rights  and  obligations  under any
Option granted before amendment of the Plan shall not be materially  altered, or
impaired adversely, by such amendment, except with consent of the person to whom
the  Option  was  granted.  An  amendment  of the Plan  shall be  subject to the
approval of the Company's stockholders only to the extent required by applicable
laws, regulations or rules.

     (c) Effect of Amendment or  Termination.  No Shares shall be issued or sold
         -----------------------------------
under the Plan after the termination thereof,  except upon exercise of an Option
granted prior to such termination. The termination of the Plan, or any amendment
thereof,  shall not affect any Share previously  issued or any Option previously
granted under the Plan.

                                      -8-



     SECTION 12.  EXECUTION.
     -----------  ----------

     To record the adoption of the Plan by the Board of  Directors,  the Company
has caused its authorized officer to execute the same as of February 27, 1997.

                                          FIRST NORTHERN BANK OF DIXON



                                          By   /s/ Owen J. Onsum
                                            ---------------------------
                                              Owen J. Onsum

                                          Its President
                                             --------------------------

                                      -9-