TAX-FREE TRUST OF OREGON
                         Supplement to the Prospectuses
                             Dated January 31, 2008

     On May 19, 2008, the U.S. Supreme Court reversed a Kentucky state court
decision that held the Kentucky law exempting interest paid on Kentucky
municipal obligations from Kentucky income tax while taxing interest on
municipal obligations of other states violated the U.S. Constitution. The
Supreme Court decision, in Department of Revenue of Kentucky v. Davis, rejected
the Kentucky court's holding that Kentucky's differential tax treatment of
in-state as against out-of-state municipal bonds violated the "negative" or
"dormant" Commerce Clause of the U.S. Constitution.

     In the view of many observers, the Supreme Court decision effectively
rejected an implicit threat to a widespread tax practice, followed by most
states, upon which the investment operations of single-state municipal bond
funds like the Trust depend.

     The paragraph describing this case under the caption "Tax Information" is
deleted.

                   The date of this supplement is June 4, 2008