<PAGE>

                                                                   EXHIBIT 10(G)

                              EMPLOYMENT AGREEMENT

     AGREEMENT between Glacier Bancorp, Inc., hereinafter called "Company" and
Ron J. Copher, hereinafter called "Executive"

                                    RECITALS

A.   Executive has been retained to be the successor to James H. Strosahl, the
     Company's Chief Financial Officer who is scheduled to retire effective
     March 31, 2007.

B.   During his transition to Chief Financial Officer, Executive will serve as
     the Senior Vice President of the Company until the earlier of Mr.
     Strosahl's retirement or March 31, 2007, at which time Executive will
     assume the title and duties of Chief Financial Officer, in addition to
     being a Senior Vice President.

C.   The Company desires Executive to be retained by the Company under the terms
     and conditions of this Agreement.

D.   Executive desires to be retained by the Company under the terms and
     conditions of this Agreement.

                                    AGREEMENT

1.   EMPLOYMENT. The Company agrees to employ Executive and Executive accepts
     employment by the Company on the terms and conditions set forth in this
     Agreement. Effective upon the date of this agreement through the earlier of
     the retirement of the current Chief Financial Officer or March 31, 2007,
     Executive will serve as a Senior Vice President of the Company. Following
     this transitional period and upon the earlier of the retirement of the
     current Chief Financial Officer or March 31, 2007, Executive will also
     assume the title and position of Chief Financial Officer.

2.   TERM. The term of this Agreement ("Term") is December 22, 2006 through
     December 31, 2007.

3.   DUTIES. The Company will employ Executive as its Senior Vice President
     until the earlier of the retirement of the current Chief Financial Officer
     or March 31, 2007, during which time he will perform such duties as
     necessary to transition to his position as Chief Financial Officer.
     Following the effectiveness of his attaining the title and role of Chief
     Financial Officer as well as continuing as a Senior Vice President,
     Executive will faithfully and diligently perform his assigned duties, which
     are as follows:

     (a)  Chief Financial Officer. The Executive shall have such duties and
          responsibilities as assigned by the Company's President and Chief
          Executive Officer, which shall be customary for Chief Financial
          Officers of comparable publicly reporting companies.

     (c)  Report to Board. Executive will report directly to the Company's
          President and Chief Executive Officer. The Company's board of
          directors may, from time to time, modify Executive's title or add,
          delete, or modify Executive's performance responsibilities to
          accommodate management succession, as well as any other management
          objectives of the Company. Executive will assume any additional
          positions, duties and responsibilities as may reasonably be requested
          of him with or without additional compensation, as appropriate and
          consistent with Sections 3(a) and 3(b) of this Agreement.

4.   EXTENT OF SERVICES. Executive will devote all of his working time,
     attention and skill to the duties and

<PAGE>

     responsibilities set forth in Section 3. To the extent that such activities
     do not interfere with his duties under Section 3, Executive may participate
     in other businesses as a passive investor, but (a) Executive may not
     actively participate in the operation or management of those businesses,
     and (b) Executive may not, without the Company's prior written consent,
     make or maintain any investment in a business with which the Company or its
     subsidiaries has an existing competitive or commercial relationship.

5.   SALARY. Executive will receive an annual salary of $190,000.00, to be paid
     in accordance with the Company's regular payroll schedule. Subsequent
     salary increases are subject to the Company's annual review of Executive's
     compensation and performance.

6.   INCENTIVE COMPENSATION. During the Term, the Company's board of directors
     will determine the amount of bonus to be paid by the Company to Executive
     for that year. In making this determination, the Company's board of
     directors will consider factors such as Executive's performance of his
     duties and the safety, soundness and profitability of the Company.
     Executive's bonus will reflect Executive's contribution to the performance
     of the Company during the year. This bonus will be paid to Executive no
     later than January 31 of the year following the year in which the bonus is
     earned by Executive.

7.   INCOME DEFERRAL. Executive will be eligible to participate in any program
     available to the Company's senior management for income deferral, for the
     purpose of deferring receipt of any or all of the compensation he may
     become entitled to under this Agreement.

8.   VACATION AND BENEFITS.

     (a)  Vacation and Holidays. Executive will receive four weeks of paid
          vacation each year in addition to all holidays observed by the Company
          and its subsidiaries. Executive may carry over, in the aggregate, up
          to four weeks of unused vacation to a subsequent year. Any unused
          vacation time in excess of four weeks will not accumulate or carry
          over from one calendar year to the next. Each calendar year, Executive
          shall take not less than one (1) week vacation.

     (b)  Benefits. Executive will be entitled to participate in any group life
          insurance, disability, health and accident insurance plans, profit
          sharing and pension plans and in other employee fringe benefit
          programs the Company may have in effect from time to time for its
          similarly situated employees, in accordance with and subject to any
          policies adopted by the Company's board of directors with respect to
          the plans or programs, including without limitation, any incentive or
          employee stock option plan, deferred compensation plan, 401(k) plan,
          and Supplemental Executive Retirement Plan (SERP). The Company through
          this Agreement does not obligate itself to make any particular
          benefits available to its employees.

     (c)  Business Expenses. The Company will reimburse Executive for ordinary
          and necessary expenses which are consistent with past practice at the
          Company (including, without limitation, travel, entertainment, and
          similar expenses) and which are incurred in performing and promoting
          the Company's business. Executive will present from time to time
          itemized accounts of these expenses, subject to any limits of the
          Company policy or the rules and regulations of the Internal Revenue
          Service.

9.   TERMINATION OF EMPLOYMENT.

     (a)  Termination by the Company for Cause. If the Company terminates
          Executive's employment for Cause (defined below) before this Agreement
          terminates, the Company will pay Executive the salary earned and
          expenses reimbursable under this Agreement incurred through the date
          of his termination. Executive will have no right to receive
          compensation or other benefits for any period after termination under
          this Section 9(a).

<PAGE>

     (b)  Other Termination by the Company. If the Company terminates
          Executive's employment without Cause before this Agreement terminates,
          or Executive terminates his employment for Good Reason (defined
          below), the Company will pay Executive for the remainder of the Term
          the compensation and other benefits he would have been entitled to if
          his employment had not terminated.

     (c)  Death or Disability. This Agreement terminates (1) if Executive dies
          or (2) if Executive is unable to perform his duties and obligations
          under this Agreement for a period of 90 consecutive days as a result
          of a physical or mental disability arising at any time during the term
          of this Agreement, unless with reasonable accommodation Executive
          could continue to perform his duties under this Agreement and making
          these accommodations would not pose an undue hardship on the Company.
          If termination occurs under this Section 9(c), Executive or his estate
          will be entitled to receive all compensation and benefits earned and
          expenses reimbursable through the date Executive's employment
          terminated.

     (d)  Termination Related to a Change in Control.

          (1)  Termination by Company. If the Company, or its successor in
               interest by merger, or its transferee in the event of a purchase
               in an assumption transaction (for reasons other than Executive's
               death, disability, or Cause) (1) terminates Executive's
               employment within 3 years following a Change in Control (as
               defined below), or (2) terminates Executive's employment before
               the Change in Control but on or after the date that any party
               either announces or is required by law to announce any
               prospective Change in Control transaction and a Change in Control
               occurs within six months after the termination, the Bank will
               provide Executive with the payment and benefits described in
               Section 9(d)(3) below.

          (2)  Termination by Executive. If Executive terminates Executive's
               employment, with or without Good Reason, within two years
               following a Change in Control, the Company will provide Executive
               with the payment and benefits described in Section 9(d)(3).

          (3)  Payments. If Section 9(d)(1) or (2) is triggered in accordance
               with its terms, the Company will: (i) pay Executive in 24 monthly
               installments in an amount equal to two times the Executive's
               annual salary (determined as of the day before the date
               Executive's employment was terminated) and (ii) maintain and
               provide for 2 years following Executive's termination, at no cost
               to Executive, the benefits described in Section 8(b) to which
               Executive is entitled (determined as of the day before the date
               of such termination); but if Executive's participation in any
               such benefit is thereafter barred or not feasible, or
               discontinued or materially reduced, the Company will arrange to
               provide Executive with either benefits substantially similar to
               those benefits or a cash payment of substantially similar value
               in lieu of the benefits.

     (e)  Limitations on Payments Related to Change in Control. The following
          apply notwithstanding any other provision of this Agreement:

          (1)  the total of the payments and benefits described in Section
               9(d)(3) will be less than the amount that would cause them to be
               a "parachute payment" within the meaning of Section 280G(b)(2)(A)
               of the Internal Revenue Code;

          (2)  the payment and benefits described in Section 9(d)(3) will be
               reduced by any compensation (in the form of cash or other
               benefits) received by Executive from the Company or its successor
               after the Change in Control; and

          (3)  Executive's right to receive the payments and benefits described
               in Section 9(d)(3) terminates (i) immediately if before the
               Change in Control transaction closes, Executive terminates his
               employment without Good Reason, or the Company terminates
               Executive's employment for Cause, or (ii) two years after a
               Change of Control occurs.

<PAGE>

     (f)  Return of Bank Property. If and when Executive ceases, for any reason,
          to be employed by the Company, Executive must return to the Company
          all keys, pass cards, identification cards and any other property of
          the Company. At the same time, Executive also must return to the
          Company all originals and copies (whether in memoranda, designs,
          devices, diskettes, tapes, manuals, and specifications) which
          constitute proprietary information or material of the Company and its
          subsidiaries. The obligations in this paragraph include the return of
          documents and other materials which may be in his desk at work, in his
          car, in place of residence, or in any other location under his
          control.

     (g)  Cause. "Cause" means any one or more of the following:

          (1)  Willful misfeasance or gross negligence in the performance of
               Executive's duties;

          (2)  Conviction of a crime in connection with his duties;

          (3)  Conduct demonstrably and significantly harmful to the Company, as
               reasonably determined on the advice of legal counsel by the
               Company's board of directors; or

          (4)  Permanent disability, meaning a physical or mental impairment
               which renders Executive incapable of substantially performing the
               duties required under this Agreement, and which is expected to
               continue rendering Executive so incapable for the reasonably
               foreseeable future.

     (h)  Good Reason. "Good Reason" means only any one or more of the following

          (1)  Reduction of Executive's salary or reduction or elimination of
               any compensation or benefit plan benefiting Executive, unless the
               reduction or elimination is generally applicable to substantially
               all Company employees (or employees of a successor or controlling
               entity of the Company) formerly benefitted;

          (2)  The assignment to Executive without his consent of any authority
               or duties materially inconsistent with Executive's position as of
               the date of this Agreement;

          (3)  The material breach of this Agreement by the Company, or

          (4)  A relocation or transfer of Executive's principal place of
               employment outside Flathead County, Montana.

     (i)  Change in Control. "Change in Control" means a change "in the
          ownership or effective control" or "in the ownership of a substantial
          portion of the assets" of the Company, within the meaning of Section
          280G of the Internal Revenue Code.

10.  CONFIDENTIALITY. Executive will not, after the date this Agreement was
     signed, including during and after its Term, use for his own purposes or
     disclose to any other person or entity any confidential business
     information concerning the Company or its business operations or that of
     its subsidiaries, unless (1) the Company consents to the use or disclosure
     of confidential information; (2) the use or disclosure is consistent with
     Executive's duties under this Agreement, or (3) disclosure is required by
     law or court order. For purposes of this Agreement, confidential business
     information includes, without limitation, trade secrets (as defined under
     the Montana Uniform Trade Secrets Act, Montana Code Section 30-14-402),
     various confidential information on investment management practices,
     marketing plans, pricing structure and technology of either the Company or
     its subsidiaries. Executive will also treat the terms of this Agreement as
     confidential business information.

11.  NONCOMPETITION. During the Term of this Agreement and for a period of two
     years after Executive's employment with the Company has terminated,
     Executive will not, directly or indirectly, as a shareholder, director,
     officer, employee, partner, agent, consultant, lessor, creditor or
     otherwise:

     (a)  provide management, supervisory or other similar services to any
          person or entity engaged in any business in counties in which the
          Company or its subsidiaries may have a presence which is competitive

<PAGE>

          with the business of the Company or a subsidiary as conducted during
          the term of this Agreement or as conducted as of the date of
          termination of employment, including any preliminary steps associated
          with the formation of a new bank.

     (b)  persuade or entice, or attempt to persuade or entice any employee of
          the Company or a subsidiary to terminate his/her employment with the
          Company or a subsidiary.

     (c)  persuade or entice or attempt to persuade or entice any person or
          entity to terminate, cancel, rescind or revoke its business or
          contractual relationships with the Company or its subsidiaries.

12.  ENFORCEMENT.

     (a)  The Company and Executive stipulate that, in light of all of the facts
          and circumstances of the relationship between Executive and the
          Company, the agreements referred to in Sections 10 and 11 (including
          without limitation their scope, duration and geographic extent) are
          fair and reasonably necessary for the protection of the Company and
          its subsidiaries confidential information, goodwill and other
          protectable interests. If a court of competent jurisdiction should
          decline to enforce any of those covenants and agreements, Executive
          and the Company request the court to reform these provisions to
          restrict Executive's use of confidential information and Executive's
          ability to compete with the Company to the maximum extent, in time,
          scope of activities and geography, the court finds enforceable.

     (b)  Executive acknowledges the Company will suffer immediate and
          irreparable harm that will not be compensable by damages alone if
          Executive repudiates or breaches any of the provisions of Sections 10
          or 11 or threatens or attempts to do so. For this reason, under these
          circumstances, the Company, in addition to and without limitation of
          any other rights, remedies or damages available to it at law or in
          equity, will be entitled to obtain temporary, preliminary and
          permanent injunctions in order to prevent or restrain the breach, and
          the Company will not be required to post a bond as a condition for the
          granting of this relief.

13.  COVENANTS. Executive specifically acknowledges the receipt of adequate
     consideration for the covenants contained in Sections 10 and 11 and that
     the Company is entitled to require him to comply with these Sections. These
     Sections will survive termination of this Agreement. Executive represents
     that if his employment is terminated, whether voluntarily or involuntarily,
     Executive has experience and capabilities sufficient to enable Executive to
     obtain employment in areas which do not violate this Agreement and that the
     Company's enforcement of a remedy by way of injunction will not prevent
     Executive from earning a livelihood.

14.  ARBITRATION.

     (a)  Arbitration. At either party's request, the parties must submit any
          dispute, controversy or claim arising out of or in connection with, or
          relating to, this Agreement or any breach or alleged breach of this
          Agreement, to arbitration under the American Arbitration Association's
          rules then in effect (or under any other form of arbitration mutually
          acceptable to the parties). A single arbitrator agreed on by the
          parties will conduct the arbitration. If the parties cannot agree on a
          single arbitrator, each party must select one arbitrator and those two
          arbitrators will select a third arbitrator. This third arbitrator will
          hear the dispute. The arbitrator's decision is final (except as
          otherwise specifically provided by law) and binds the parties, and
          either party may request any court having jurisdiction to enter a
          judgment and to enforce the arbitrator's decision. The arbitrator will
          provide the parties with a written decision naming the substantially
          prevailing party in the action. This prevailing party is entitled to
          reimbursement from the other party for its costs and expenses,
          including reasonable attorneys' fees.

     (b)  Governing Law. All proceedings will be held at a place designated by
          the arbitrator in Flathead County, Montana. The arbitrator, in
          rendering a decision as to any state law claims, will apply Montana
          law.

     (c)  Exception to Arbitration. Notwithstanding the above, if Executive
          violates Section 10 or 11, the Company will have the right to initiate
          the court proceedings described in Section 12(b), in lieu of an

<PAGE>

          arbitration proceeding under this Section 14.

15.  MISCELLANEOUS PROVISIONS.

     (a)  Entire Agreement. This Agreement constitutes the entire understanding
          and agreement between the parties concerning its subject matter and
          supersedes all prior agreements, correspondence, representations, or
          understandings between the parties relating to its subject matter.

     (b)  Binding Effect. This Agreement will bind and inure to the benefit of
          the Company's, its subsidiaries' and Executive's heirs, legal
          representatives, successors and assigns.

     (c)  Litigation Expenses. If either party successfully seeks to enforce any
          provision of this Agreement or to collect any amount claimed to be due
          under it, this party will be entitled to reimbursement from the other
          party for any and all of its out-of-pocket expenses and costs
          including, without limitation, reasonable attorneys' fees and costs
          incurred in connection with the enforcement or collection.

     (d)  Waiver. Any waiver by a party of its rights under this Agreement must
          be written and signed by the party waiving its rights. A party's
          waiver of the other party's breach of any provision of this Agreement
          will not operate as a waiver of any other breach by the breaching
          party.

     (e)  Assignment. The services to be rendered by Executive under this
          Agreement are unique and personal. Accordingly, Executive may not
          assign any of his rights or duties under this Agreement.

     (f)  Amendment. This Agreement may be modified only through a written
          instrument signed by both parties.

     (g)  Severability. The provisions of this Agreement are severable. The
          invalidity of any provision will not affect the validity of other
          provisions of this Agreement.

     (h)  Governing Law and Venue. This Agreement will be governed by and
          construed in accordance with Montana law, except to the extent that
          certain regulatory matters may be governed by federal law. The parties
          must bring any legal proceeding arising out of this Agreement in
          Flathead County, Montana.

     (i)  Counterparts. This Agreement may be executed in one or more
          counterparts, each of which shall be deemed to be an original, but all
          of which taken together will constitute one and the same instrument.

Signed this 22nd day of December, 2006.

                                        GLACIER BANCORP, INC.


                                        /s/ Michael J. Blodnick
                                        ----------------------------------------
                                        Michael J. Blodnick
                                        President/CEO


Attest:


/s/ LeeAnn Wardinsky
-------------------------------------
LeeAnn Wardinsky
Assistant Secretary

                                        EXECUTIVE


                                        /s/ Ron J. Copher
                                        ----------------------------------------
                                        Ron J. Copher