My hunch was right, the ice out flight will happen this week...

In case you are not a Facebooker, I am cross-posting this announcement from the Friends of Algonquin Park Facebook page:

Ontario Parks staff will be conducting an ice out flight sometime during April 18 to 21, 2011 to assess current ice conditions throughout Algonquin Park. The exact date can not be confirmed as the flight is dependent upon suitable weather conditions. Results of the ice out flight will be posted at http://www.algonquinpark.on.ca/news/ice-out.php as soon as they are available.

Along with many other great images, the Friends also recently posted a few aerial shots of popular lakes along Highway 60, taken April 12. Here's one of them, showing Tea, Smoke, Bonita and Canoe Lakes: 

You can see the Friends of Algonquin Park complete ice-out gallery here.