The Tree Problem sits on the uphill side of The Parking Lot Boulder, strangely enough no where near a tree. Climbing is sustained, and many approaches can get you through the problem depending on your height and finger size.
Top out over the top after 8 or so hard moves and a good rest in the middle.
When I first did this problem 10 or 12 years ago there was a tree. And if you fell on the closing moves you would hit that tree. We always wanted the tree to disappear and one day it did. One day the tree mysteriously ended up 15 feet over to the right of the boulder (car jack?). Now we have the Deforestation problem!