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                                                                 EXHIBIT 10.15
                                       
                                       
                  AMENDMENT NO. 1 TO BUSINESS LOAN AGREEMENT
                                       
     This Amendment No. 1 (the "Amendment") dated as of July 23, 1996, is
between Bank of America NT & SA (the "Bank") and Portland Brewing Company (the
"Borrower").

                                   RECITALS
                                       
     A.   The Bank and the Borrower entered into a certain Business Loan
Agreement dated as of December 15, 1995 (the "Agreement").

     B.   The Bank and the Borrower desire to further amend the Agreement.

     C.   The Bank is the successor by merger to Bank of America Oregon.

                                   AGREEMENT
                                       
     1.   DEFINITIONS.  Capitalized terms used but not defined in this
Amendment shall have the meaning given to them in the Agreement.

     2.   AMENDMENTS.  The Agreement is hereby amended as follows:

          2.1  Paragraph 3.1 of the Agreement is amended to read in its
entirety as follows:

               3.1  LINE OF CREDIT AMOUNT.
               
               (a)  During the availability period described below, the Bank
                    will provide a line of credit to the Borrower.  The amount
                    of the line of credit (the "Facility 3 Commitment") is One
                    Million Four Hundred Thousand Dollars ($1,400,000).
                    
               (b)  This is a non-revolving line of credit with a term
                    repayment option.  Any amount borrowed, from the date of
                    this Amendment and repaid before the end of the
                    availability period, permanently reduces the remaining
                    available line of credit.
                    
               (c)  The Borrower agrees not to permit the outstanding principal
                    balance of the line of credit to exceed the Facility 3
                    Commitment.
                    
          2.2  Paragraph 3.2 of the Agreement is amended to read in its
entirety as follows:

               3.2  AVAILABILITY PERIOD.  The line of credit is available
               between the date of this Agreement and August 1, 1996 (the
               "Expiration Date") unless the Borrower is in default.
               
          2.3  Subparagraph 3.4(b) of the Agreement is amended to read in its
entirety as follows:

               (b)  The Borrower will make one (1) payment of Seven Thousand
                    One Hundred Thirty Six 25/100 Dollars ($7,136.25) on
                    August 1, 1996.  The 

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                    Borrower will then repay the principal in 76 successive
                    monthly installments of Eighteen Thousand Eighty Nine 15/100
                    Dollars ($18,089.15) starting September 1, 1996.  On
                    January 1, 2003, the Borrower will repay the remaining
                    principal balance plus any interest then due.

     3.   EFFECT OF AMENDMENT.  Except as provided in this Amendment, all of
the terms and conditions of the Agreement shall remain in full force and
effect.

     This Amendment is executed as of the date stated at the beginning of this
Amendment.

BANK OF AMERICA NT & SA            PORTLAND BREWING COMPANY


/s/ Ed Kluss                       x Glen James
--------------------------         -----------------------------
By:  Ed Kluss                      By:
Title: Vice President              Title:    CFO

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