My mystery flowers are so tiny I had to lie down on the gravel to shoot them. They all face downwards so I had to position the camera to go up and under! After this effort, I now got to my feet covered in gravel! Oh, and the wee green bug is a bonus! I will have to go back and see if I can get it!
I have heard from Tony - @tonygig that the flower is: Erythronium oregonum I've checked on different sites and this is a top identification!
Looks like a ballet of petals on the evening breeze - I can imagine them spinning and twirling. Beautiful creation and well worth a little gravel I'm sure.