EXHIBIT 16 LETTER REGARDING CHANGE IN ACCOUNTANTS [COOPERS & LYBRAND LETTERHEAD] August 6, 1997 Securities and Exchange Commission 450 5th Street, N.W. Washington, D.C. 20549 Gentlemen: We have read the disclosures made by Oregon Trial Financial Corp. contained in the Form S-1, File no. 333-30051, under the caption "Change in Accountants." We agree with the statements concerning our Firm in such Form S-1. Very truly yours, /s/ Coopers & Lybrand L.L.P. Coopers & Lybrand L.L.P.