Nice lines. You exposed the sky well but the trees are a little bright still. Nicely done for minimal edits though as this can be worked out nicely in PP.
Nice perspective and contrast.
One of my top picks.
The sky looks a tad grainy but it could be my monitor
so I didn't hold it against the photo.
Very nice.
The composition of having the two aspens grow out of the bottom corners and stretch to the sky makes me, the view feel very small indeed in the presence of this two trees. The white trunks really contrast boldly off of the blue sky. My only critique is that I wish that those two trees could be the only elements in the composition, but I'm sure that it was nearly impossible to find trees that were remote from other things (I found that to be challenging myself in shooting for this challenge)