Katherine Ann Olson, age 24, of Cottage Grove. Survived by parents, Rev. Rolf and Nancy Olson; sister, Sarah Richter and husband, Doug; brother, Karl Olson; grandparents, JoAnn and Thomas Pirsch; great-aunt, Gretchen Pirsch; other loving aunts, uncles, cousins and many friends. She was preceded in death by grandparents, Harry and Evelyn Olson. Memorials are preferred to Richfield Lutheran Church.