Hi Kathy, you can get a copy of her obit (if published) from the Secretary of State at http://www.secstate.wa.gov/library/ask.aspxhttp://www.secstate.wa.gov/library/ask.aspx. They will search the newspaper microfilm for one hour at no charge & reply with what they find. Hopefully you know where she died because that will help in their search.
Here's a list of Cemeteries and their indexes in Whitman County. Interment.net, www.interment.net/us/wa/whitman.htm; Ewanida Rail Records, www.mrail.net/wash/whitman.htm. Successful Hunting!