First off, there are two waterfalls along the Montreal River just outside of Ironwood/Hurley, and there is confusion about which is named which. They are only about half a mile from each (at the most). I am basing these names on information found at this site.
I first saw Peterson Falls about 3 years ago, but couldn’t figure out how to see Interstate Falls. There is no real sign indicating a path to the falls. Trails actually start at the real estate signs posted on trees, as the area on the Wisconsin side near the falls is currently for sale.
In October 2010, I found the trail to the falls, which can be found as an offshoot of the far more obvious trail to Peterson Falls. As mentioned above, you might also be able to start at another point near the real estate sign that is a shorter hike to the falls. When I finally arrived at the falls, I was only mildly surprised to find out that there was a huge amount of water flowing over the falls. The western portion of the Upper Peninsula had gotten a LOT of rain, and this meant that some of the rivers had very high volumes, some much higher than even in spring. There were flood warnings on certain rivers. This made it almost impossible to get great pictures because there was an amazing amount of spray. Looking at other pictures of the falls, I’ve never seen this much water flowing.
1) From Ironwood/Hurley, head west on US-2. You will pass from Michigan into Wisconsin.
2) After a short distance, you will see Center Drive on your right. If you take a look, you will even notice a white sign for one of the falls.
3) Turn right onto Center Drive, a dirt road, a head down it. At one point, you will veer right.
4) You’ll see a real estate sign. You might be able to park here.
5) Walk along the trail nearby, heading toward the river. You can see the crest of the falls, but getting to the base can be more difficult (especially in such high flow).
Accessibility: 9/10 (crest), 6/10 (base)
Where in the World is Interstate Falls?: map