Mark Steven Duffy, 69, of Cottage Grove, passed away peacefully at his home at Drumlin Reserve on September 10, 2025, from congestive heart failure. He was born on October 28, 1955, to Richard Paul Duffy and Verdeen Marie (Duffy) Rock. Mark will be laid to rest at Sacred Heart Catholic Cemetery in Sun Prairie near his father. A private celebration of life will be held at a future date.

Complete obituary in the Sept. 18th issue of the Boscobel Dial