Native wildflower called Rose Pink. Also known as Bitterbloom.
As I was photographing this flower a ranger came over. He was leading a group of boys on a naturalist hike, so everyone gathered around. He said he was an expert on wildflower identification and asked me if I would like for him to identify this flower for me. I said "Sure!" He looked at it for several minutes and then said he had never seen one before and didn't have a clue. LOL