Ok so the Toronto skyline should not be visible from Barrie due to the distance between the two (85 km). At this distance, the curvature of the earth would hide everything from a ground view. In fact, the curvature at that distance would hide the first 500-600m and the cn tower is only 553m.
So I came across this post of a guy asking if you would be able to see it from a drone shot or something above. Comments say probably not, guy explains the only reason he even asked was because he saw a panorama shot once of above Barrie and claimed you could just make out a skyline in the distance. Well, I checked the panorama shot, and I think you can actually see both a skyline and the cn tower. The pictures are extremely blurry, but see that faint cluster of buildings? And then just to the right you can make out a taller, but much skinnier streak. That’s gotta be the cn tower right? If it is, an awesome catch from the guy who asked the question.