My guesses (Part II)...
1)Tillamook Bay
2)Kalama River
3)Mouth of the Lewis
4)SF Calawah
5)Reiter on the Sky
6)Crooked River

RT-
You must have looked at the same website that I did but the one that I saw said that you could see Mt. Hood from her Washington Ranch so given the scenary my best guess was the Klickitat.

I was thinking the John Day because its one river system west of the Deschutes and well it kinda matched the scenary of the high elevation John Day but this creek just seemed too small but I thought hey why not but since you got to the John Day before I did Im going to take Crooked Creek which is a high elavation trib of the Deschutes.