Hi Janis, This may be a challenge. Let's assume she married in Tillamook County. The marriage records from 1855-1964 are in the Tillamook County Courthouse, Clerk's Basement Storage Room.
I think you'll need a volunteer to look for the marriage certificate. There is one at Random Acts Genealogical Kindness. Go to www.raogk.org, read guidlines, choose Oregon and choose Tillamook Co. Successful Searching!