[cornewut]

http://en.m.wikipedia.org/wiki/Jānis_Pīnups

This guy came out of hiding 50 years after the end of WW2

[Someone]

There's also "nazi Kurt", who hid above the arctic circle until 1981: http://www.strangehistory.net/2010/06/27/nazi-kurt-captured-....

(Mentioning this for the similarity to operation Zitronella and because StrangeHistory.net is an interesting site)

[xefer]

Yes. This was the only German land operation on the North American continent during WWII