Help with removing tress and replacing with sky

I would like to remove the trees from behind the hill so only the sky shows but I'm having quite a difficult time. Any help is greatly appreciated!!

Link to photo - http://www.flickr.com/photos/23268265@N06/4627753091/

Thanks!

Im guessing the reds on a different layer? i could be wrong haha. i'd cut a line roughly along the grass and around the trees with the pen tool right click make selection then - making sure your on the layer with the sky on - use the clone stamp to stick some random sky in from above, hope that helps.

The quick and dirty way to do it, would be to use the polygonal lasso tool or the pen tool to select the areas where there are trees.

Once you have everything selected, then use the clone stamp tool to fill in the areas where there are trees.

Finished


This is one way to do it; there are other ways to get those trees out of the picture.

I hope this helps,

Take care

if you have cs4 you can bring up the pixels to max and sky clone them out a lot of work but i see what you mean would improve the image greatly.....nice shot