There were quite a few references to a waterfall in Eastern Oregon where the Indians would go to fish. While Celilo Falls weren't mentioned, they are the falls that I wanted to use as the inspiration, since they no longer exist. Below are a few old pictures on the Internet.
I also looked through a sales brochure to find a picture of a woman from the back that I used as the model for both of my girls. These pictures enabled me to refine my sketches of the girls (left) and the background (below).
In order to sew the background, I flipped each pattern piece over. I traced around the pattern on the reverse side of the fabric and made the match marks in the seam allowances. Then the seams were sewn. Here is the background after piecing, but before enhancing.
Stay tuned for updates as I continue to work on this landscape quilt.