On the Mt Whitney summit, I met a guy from Pennsylvania who had just completed the JMT hike. He mentioned a spectacular rainbow by Guitar Lake the evening before, so I asked him to send me pictures. And here they are...
Trying to get oriented, here, let's see , these pix have to be all facing more or less east, so Whitney summit would be, mmmmmmmmmm, (cue Judy) Somewhere, Over the Rainbow?