@TexChik I don't know the history. From what I gathered off the net below.
The "Columbia River basin was in the homelands of the Chinook-speaking Multnomah, Wasco, and Wishram Indians."
Sioux nation covers more of the area around the Dakotas. The badlands have the same type of coulee rock formations as eastern, WA. Your eyes didn't deceive you. 😉
@TexChik east of the Cascades, WA is a just a huge desert with a spiderweb of mosty underground springs formed by the development of the Columbia river. The springs span the central and eastern portion of the state. Late 1800s, farmers began damning up the springs for irrigation, and as a by product, it created thousands of small lakes like these in the photos. The water is clean and rich with aquatic insects, crustaceans, leeches, etc. Perfect conditions for trout to thrive.
@BizSuitStacy Stunning pic! I live on the western side of Wa and we go to eastern Wa all of the time mostly the Leavenworth/Wenatchee area. My parents lived in Moses Lake until they both died.