Absolutely amazing!
We visited in late December and the lines were very long for the shuttle. So I can only guess how packed this park would be in the summer!!! We had to wait for several shuttles to stop by before there was room for us! And the shuttles were running every few minutes!
We explored many different areas of the canyon and surrounding area. I wish I had enough time and planned for the Narrows. But hopefully next time!
The shuttles do not run in Jan to March. I would like to visit then guessing the crowds are minimal!
Even if you just stop for a few hours, you will be amazed! You do not have to travel very far to see the phenomenal views!