Areas in north west or north central Minnesota

Recently moved to Minnesota, have been climbing at Taylors Falls with my girlfriend the last few weekends. We have an opportunity to spend some time in Ottertail County area coming up and I was wondering if there were any climbable areas that way?

I have looked here and in the falcon guide but see nothing much farther north and west than the St. Cloud area.

Granted the area was smushed flat and filled with sand during the pleistocene I would think there would be boulders or something farther up towards Bemidji.