I worked as a volunteer river ranger just 10 miles outside of Yosemite this summer so I had a lot of opportunities to visit the park. On this particular night I was actually pretty peeved that there was a (45%) moon because I generally try to keep the moon out of my astro shots unless its a moonrise or set. After about 3 miles I got to my intended viewpoint and much to my surprise there was another photographer setting up there. I was extremely surprised as this location was slightly off trail, in the dark, and about 3 miles away from civilization. I started chatting to him and he pulled out his phone to show me a moonbow picture he had got from the same location last year. So this photo, when you come down to it, is kind of me just getting lucky to have the right conditions.
Very interesting get! Good job