Document:

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                                                                     EXHIBIT 4.3

                              CERTIFICATE OF TRUST

                                       OF

                             GLACIER CAPITAL TRUST I

            This CERTIFICATE OF TRUST of Glacier Capital Trust I (the "Trust")
is being duly executed and filed by the undersigned, as trustees, to form a
business trust under the Delaware Business Trust Act (12 Del. C. ss. 3801 et
seq.)

            1.    The name of the business trust formed by the Certificate of
                  Trust is Glacier Capital Trust I.

            2.    The name and business address of the trustee of the Trust in
                  the State of Delaware is Wilmington Trust Company, Rodney
                  Square North, 1100 North Market Street, Wilmington, Delaware
                  19890-0001, Attention: Corporate Trust Administration.

            3.    This Certificate of Trust shall be effective upon filing with
                  the Secretary of State of the State of Delaware.

            IN WITNESS WHEREOF, the undersigned being the trustees of the Trust,
have executed this Certificate of Trust as of December __, 2000.

                                    WILMINGTON TRUST COMPANY, not in its
                                    individual capacity, but solely as trustee

                                    By:
                                       -----------------------------------------
                                    Name:
                                    Title:

                                    --------------------------------------------
                                    James Strosahl, as trustee<PAGE>   1
                                                                     EXHIBIT 4.4

                                 TRUST AGREEMENT
                                       OF
                             GLACIER CAPITAL TRUST I

        THIS TRUST AGREEMENT OF GLACIER CAPITAL TRUST I is dated as of December
__, 2000 (the "Trust Agreement"), by and among (i) Glacier Bancorp, Inc., a
Delaware corporation (including any successors or assigns, the "Depositor"),
(ii) Wilmington Trust Company, a Delaware banking corporation duly organized and
existing under the laws of the State of Delaware, as trustee (the "Delaware
Trustee"), and (iii) James Strosahl, an individual, whose address is c/o Glacier
Bancorp, Inc., as trustee (the "Administrative Trustee" and jointly with the
Delaware Trustee, the "Trustees"). The Depositor and the Trustees hereby agree
as follows:

        1. The trust created hereby shall be known as "Glacier Capital Trust I"
(the "Trust"), in which name the Trustees or the Depositor, to the extent
provided herein, may conduct the business of the Trust, make and execute
contracts, and sue and be sued.

        2. The Depositor hereby assigns, transfers, conveys and sets over to the
Trust the sum of $10. Such amount shall constitute the initial trust estate. It
is the intention of the parties hereto that the Trust created hereby constitute
a business trust under Chapter 38 of Title 12 of the Delaware Code, 12 Del. C.
ss. 3801, et seq. (the "Business Trust Act"), and that this document constitute
the governing instrument of the Trust. The Trustees are hereby authorized and
directed to execute and file a certificate of trust with the Secretary of State
of the State of Delaware in such form as the Trustees may approve.

        3. An amended and restated Trust Agreement satisfactory to each party to
it and substantially in the form to be included as an exhibit to the
Registration Statement (the "1933 Act Registration Statement") referred to
below, or in such other form as the parties thereto may approve, will be entered
into to provide for the contemplated operation of the Trust created hereby and
the issuance of the Preferred or Capital Securities and Common Securities
referred to therein. Prior to the execution and delivery of such amended and
restated Trust Agreement, the Trustees shall not have any duty or obligation
hereunder or with respect of the trust estate, except as otherwise required by
applicable law or as may be necessary to obtain prior to such execution and
delivery any licenses, consents or approvals required by applicable law or
otherwise. Notwithstanding the foregoing, the Trustees may take all actions
deemed proper as are necessary to effect the transactions contemplated herein.

        4. The Depositor, as the Depositor of the Trust, is hereby authorized
(i) to file with the Securities and Exchange Commission (the "Commission") and
to execute, in the case of the 1933 Act Registration Statement and 1934 Act
Registration Statement (as herein defined), on behalf of the Trust, (a) the 1933
Act Registration Statement, including pre-effective or post- effective
amendments to such Registration Statement, relating to the registration under
the Securities Act of 1933, as amended (the "1933 Act"), of the Preferred or
Capital Securities of the Trust, (b) any preliminary prospectus or prospectus or
supplement thereto relating to the Preferred or Capital Securities required to
be filed pursuant to the 1933 Act, and (c) a

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Registration Statement on Form 8-A or other appropriate form (the "1934 Act
Registration Statement") (including all pre-effective and post-effective
amendments thereto) relating to the registration of the Preferred or Capital
Securities of the Trust under the Securities Exchange Act of 1934, as amended;
(ii) to file with the New York Stock Exchange or other exchange or the Nasdaq
National Market and execute on behalf of the Trust a listing application and all
other applications, statements, certificates, agreements and other instruments
as shall be necessary or desirable to cause the Preferred or Capital Securities
to be listed or quoted on the New York Stock Exchange or such other exchange or
the Nasdaq National Market; (iii) to file and execute on behalf of the Trust
such applications, reports, surety bonds, irrevocable consents, appointments of
attorney for service of process and other papers and documents as shall be
necessary or desirable to register the Preferred or Capital Securities under the
securities or "Blue Sky" laws of such jurisdictions as the Depositor, on behalf
of the Trust, may deem necessary or desirable; and (iv) to execute, deliver and
perform on behalf of the Trust an underwriting agreement with the Depositor and
the underwriter or underwriters of the Preferred or Capital Securities of the
Trust. In the event that any filing referred to in clauses (i)-(iii) above is
required by the rules and regulations of the Commission, the New York Stock
Exchange or other exchange or the Nasdaq National Market, or state securities or
Blue Sky laws to be executed on behalf of the Trust by the Trustees, the
Trustees, in their capacities as trustees of the Trust, are hereby authorized
and directed to join in any such filing and to execute on behalf of the Trust
any and all of the foregoing, it being understood that the Trustees, in their
capacities as trustees of the Trust, shall not be required to join in any such
filing or execute on behalf of the Trust any such document unless required by
the rules and regulations of the Commission, the New York Stock Exchange or
other exchange or the Nasdaq National Market, or state securities or Blue Sky
laws. In connection with all of the foregoing, the Trustees, solely in their
capacities as trustees of the Trust, and the Depositor hereby constitute and
appoint each of Mick Blodnick and James Strosahl as his, her or its, as the case
may be, true and lawful attorney-in-fact and agent each with full power of
substitution and resubstitution for the Depositor or in the Depositor's name,
place and stead, in any and all capacities, to sign any and all amendments
(including all pre-effective and post-effective amendments) to the 1933 Act
Registration Statement and the 1934 Act Registration Statement and to file the
same, with all exhibits thereto, and any other documents in connection
therewith, with the Commission, granting unto each such attorney-in-fact and
agent full power and authority to do and perform each and every act and thing
requisite and necessary to be done in connection therewith, as fully to all
intents and purposes as the Depositor might or could do in person, hereby
ratifying and confirming all that each such attorney-in-fact and agent or their
respective substitute or substitutes, shall do or cause to be done by virtue
hereof.

        5. This Trust Agreement may be executed in one or more counterparts.

        6. The number of trustees of the Trust initially shall be two and
thereafter the number of trustees of the Trust shall be such number as shall be
fixed from time to time by a written instrument signed by the Depositor which
may increase or decrease the number of trustees of the Trust; provided, however,
that to the extent required by the Business Trust Act, one trustee of the Trust
shall either be a natural person who is a resident of the State of Delaware or,
if not a natural person, an entity which has its principal place of business in
the State of Delaware and otherwise meets the requirements of applicable law.
Subject to the foregoing, the Depositor is entitled to appoint or remove without
cause any trustee of the Trust at any time. Any trustee of the Trust may resign
upon thirty days' prior notice to the Depositor.

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        7. The Depositor hereby agrees to (i) reimburse the Trustees for all
reasonable expenses (including reasonable fees and expenses of counsel and other
experts) and (ii) indemnify, defend and hold harmless the Trustees and any of
the officers, directors, employees and agents of the Trustees (the "Indemnified
Persons") from and against and all losses, damages, liabilities, claims,
actions, suits, costs, expenses, disbursements (including the reasonable fees
and expenses of counsel), taxes and penalties of any kind and nature whatsoever
(collectively, "Expenses"), to the extent that such Expenses arise out of or are
imposed upon or asserted at any time against such Indemnified Persons with
respect to the performance of this Trust Agreement, the creation, operation or
termination of the Trust or the transactions contemplated hereby; provided,
however, that the Depositor shall not be required to indemnify any Indemnified
Person for any Expenses which are a result of the willful misconduct, bad faith
or gross negligence of such Indemnified Person.

        8. The Trust may be dissolved and terminated before the issuance of the
Capital or Preferred Securities of the Trust at the election of the Depositor.

        9. This Trust Agreement shall be governed by, and construed in
accordance with, the laws of the State of Delaware (without regard to conflict
of laws principles).

        IN WITNESS WHEREOF, the parties hereto have caused this Trust Agreement
to be duly executed as of the day and year first above written.

                                          Glacier Bancorp, Inc., as Depositor

                                          By:
                                             -----------------------------------
                                          Name:
                                          Title:

                                          Wilmington Trust Company, as trustee

                                          By:
                                             -----------------------------------
                                          Name:
                                          Title:

                                          James Strosahl, as trustee

                                          --------------------------------------

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