Official 2017 Ice Out Date Recorded for Algonquin Park — High winds and heavy rain caused Lake Opeongo, Algonquin Park's largest lake, to shed its ice cover today (April 25, 2017), just slightly earlier than the average ice out date of April 28 (1964 to 2016). Technically, the official ice out date for Algonquin Park is recorded when a boat can safely navigate from the Lake Opeongo Access Point to the Happy Isle Portage in the North Arm of Lake Opeongo. Ice out has ranged from as early as March 29 (2012) to as late as May 15 (1972). For more details see http://www.algonquinpark.on.ca/news/ice-out.php