The question is, does the cache page (or the trackable page for that matter) contains personal information?
I believe that id does. Both pages contain at least a persons Geocaching username and most likely the IP (or multiple IP's) from where the owner has posted logs on the page. If someone has the "right to be forgotten", I believe they should be required to remove it if the person requests that. By this I mean completely remove it, not just archive, because archived pages still remain accessible for the viewing purposes. That is of course, my personal opinion.