Another unidentified but not inscrutable Horace Sykes Kodachrome from ca. 1949. There are not that many steams like this on the dry side of the Cascades – south of Canada. Bigger than most creeks, but not a big river. Another good clue for someone willing to spend some time flying along ten feet above the ground with Google Earth is that here we detect a highway between the stream and the cliff. Perhaps the Okanogan late summer?