In many cases I've seen at places like Johnson Creek, including Johnson Creek, the ridges around the airport intimidate the somewhat uninitiated. To fly a "normal" downwind, you need to be down IN the canyon, and thus close to dirt, which gives a lot of pilots a bad case of the quivers. So, they fly their downwind ABOVE the ridgeline, which is way higher than is healthy for most planes. Start an approach high, and the result is often too high/too fast or both over the runway.
That certainly appears to be what happened here. In the mountains, sometimes you have to fly close to terrain. If that makes you REALLY uncomfortable, best to stay out of the mountains.