It appears that in 1975 I spent some time camping and sketching in Algonquin Park, Ontario. It was a time when we took a camping trip in the park on familiar ground before heading off on a trans Canada trip that would take us as far away as Vancouver Island. That is whole other story.
I do remember this particular tree perched on the rocky edge of Lake Provoking. There was something about the tree and its ability to survive and grow against all adversity pushing roots out to find the soil that convinced me to make the sketch.
The scale of the Hemlock trees compared to others around led me to read about them and have found that their life could fill well over five hundred years. As large as they seemed i guess they are teenagers as Hemlock trees go.