The next large waterfall on the upper McKenzie River is Koosah Falls. This one was a bit frustrating... there is exactly one spot where you can get a view which is unobscured by foliage: this is it. According to the interpretive signs, the flows that created Sahalie and Koosah falls are of about the same age as the one that created Clear Lake, about 3000 years. I find it curious that during a relatively short period of time, three large effusions of lava erupted from three separate, albeit close-by, vents. However, statistically, that sort of clustering is to be expected.