Is this a rainbow or moonbow? My guess is this shot was taken somewhere on the Four Mile Trail, but I didn't know the rainbow from the sun was visible that far west in the morning. Where and what time was this shot taken? I like the slow shutter and the intense color, especially in the blue. Have you ever hiked to that ridge in the foreground of this image and shot down into the mist at the base of the falls. Is that even possible? I bet you could get a circular rainbow from there.