[JAWs]

If he has a state trademark, it won't cross state borders.

Also Minnesota Fishing may not be trademarkale as it is so highly descriptive and generic.

[Talkwire]

Since you are using the term 'Minnesota Fishing' as a descriptive title to your page, you should have no worries. It is not used as your URL or brand name, it is merely a label describing the content on the page. He cannot prevent you from using it anymore than "Minnesota Weather".