There's a guy on facebook -- Ed Cesnalis -- who does some amazing, daring photography from his tiny airplane over the Sierra. This recent posting really puts the Tuolumne into perspective. Highly recommend following his work for any window-seat starers who can't get enough!
https://scontent-ort2-1.xx.fbcdn.net/v/t1.0-9/25353886_1610619738976885_3389567847484113859_n.jpg?oh=1d328008a37fad0aba5617e85d71db96&oe=5AD24D2E