Of all of the waterfalls in the Keweenaw, Douglass Houghton Falls may be the trickiest to get to. It's not actually difficult to get to the waterfall (unlike, say, Montreal Falls or some of the unnamed falls far back in the trackless wilderness), but this waterfall is on private land and the owners do not encourage visitors. Several years after my summer of waterfalls, I finally was able to visit the very last named waterfall in the Keweenaw, with permission.
Douglass Houghton Falls are, by far, the best waterfall I've seen in the Copper Country. They are extremely tall and extremely beautiful, and I can only imagine how amazing they would be in the spring melt, or even frozen in the winter.
Please do not trespass!