Home > Portland Square 0 events found. There were no results found. There were no results found. Portland Square Events Venues Portland Square 10th Ave E & E 4th St Duluth, MN 55805 United States Get Directions Events at this venue Today Upcoming Upcoming Select date. Previous Events Today Next Events Subscribe to calendar Google Calendar iCalendar Outlook 365 Outlook Live Export .ics file Export Outlook .ics file