As a follow up to the previous post, I waited a few days and checked the satellite image again. Actually, I was forced to wait, since up until Monday we had very little blue sky. Check the image for September 17 - there is a definite, visible red tinge on the west side of Algonquin Park. Who needs to look out a window any more!
If you want a more definitive perspective, check out Ontario's Fall Colours Report.