PortlandPortland’s Mill Ends Park, the world’s second-smallest park, celebrates 50th anniversary on St. Patrick’s DayBy Kristian Foden-Vencil (OPB)March 17, 2026 1 p.m.Mill Ends Park, at just 452 square inches, became an official city of Portland park on March 17, 1976.📨 Daily news in your inboxSign up today for OPB’s “First Look” – your daily guide to the most important news and culture stories from around the Northwest.EmailPlease leave this field blankSign up