Hello! I’m pretty sure the grace tree from 4x10 is located at Redwood Park in South Surrey. Here’s a pic I snapped the other day 🙂
Well, I'll be damned! Oddly enough, I too was just visiting this tree about a month ago because it also appears in 11x21 in the scene where Dean is talking to Chuck in the park (they added a little playground in front of it in that scene).
I gave it a good examination just now, comparing both your photo and the ones I took to the scene in 4x10, and I agree, you are absolutely right!
Some of the limbs on the left side of the tree have been cut off some time in the last 13 years (you can see where they were in one of my other pics), but there is a quite distinctive burl in one of the limbs that they briefly pan past on camera that sealed the deal for me.
Thank you, @tibblers, I am labeling this one as found! Excellent scouting work!