Rainbow Valley
The north face of Mt. Everest. The Rainbow Valley is located near the summit, below the small clouds to the east.
Geography
LocationMt. Everest
Traversed byNorth-East Ridge Route (above)

https://books.google.com/books?id=epWdBgAAQBAJ&pg=PA179&dq=%22rainbow+valley%22+everest&hl=en&sa=X&ved=0ahUKEwi7k-u3rMvLAhUY-mMKHexWB4YQ6AEINDAC#v=onepage&q=%22rainbow%20valley%22%20everest&f=false page 179

https://books.google.com/books?id=qlvLCQAAQBAJ&pg=PT375&dq=%22rainbow+valley%22+everest&hl=en&sa=X&ved=0ahUKEwi7k-u3rMvLAhUY-mMKHexWB4YQ6AEIKTAA#v=onepage&q=%22rainbow%20valley%22%20everest&f=false

https://books.google.com/books?id=SabSCQAAQBAJ&pg=PT109&dq=%22rainbow+valley%22+everest&hl=en&sa=X&ved=0ahUKEwi7k-u3rMvLAhUY-mMKHexWB4YQ6AEISjAG#v=onepage&q=%22rainbow%20valley%22%20everest&f=false

http://www.macleans.ca/society/life/everest-the-open-graveyard-waiting-above/

http://news.blogs.cnn.com/2012/05/22/overheard-on-cnn-com-is-mount-everest-like-a-morgue/comment-page-10/