This one was built back in early spring, when I was riding roads. It is at a county park 3.5 miles from my house. It wasn't exactly built, but rather altered to produce a rideable line. No proper singletrack here, but lots of rocks/boulders to ride, and a few other interesting items that helped add spice to my rides.
I've only cleaned it a handful of times, and had some spectacular failures in that span. The highest point is a chainring devouring monster, so a little momentum is required to ride it over. There is one smaller rock behind the large one to prevent an endo off the backside(assuming you actually hit it). The trickiest part is the entry, due to a large root just off the screen on bottom, which hits the back tire as the rock hits the front.
More advanced than any sanctioned low speed balance feature you're likely to find on a Michigan trail. It is a truly challenging feature. High degree of difficulty and moderate risk.