I expect this to be near impossible but here goes...
The 21st July 2017 I was visiting an island on the west coast of Scotland named Gigha. Whilst there a lady asked to take mine and my girlfriends photograph on the bench outside the BoatHouse restaurant. She said she would like to use the photo to create a sculpture.
To see this photograph would mean more than I can explain.
Clues to assist:
1) The woman was American on holiday with her daughter, both white
2) I'd guess around 60-70 years old her daughter 30-35ish (my memory is vague)
3) On Gigha on the 21st/22nd July 2017
4) Possibly a sculptor/artist
5) Possible ancestry links to the area
6) I'm guessing voted democrat (Trump joke somewhere)
Is this beyond 4Chan?
My logic is there can't be many retired American artists in such a remote region of Scoland with their daughter at that time. Plus if she's an artist she may have a website or something.