The Very Difficult trail, also known as Expert or Black trail, is primarily located in the middle of the park. To reach this area, you must ride the More Difficult loop. There are a couple other smaller sections of Very Difficult trail spread throughout the park. These areas are for more experienced riders and feature more logs, rocks, and other man-made obstacles (some unavoidable). In general if you cannot ride the filter (first obstacle at the entrance of the trail section) you should re-consider riding that section of trail. There are 2.14 miles of Very Difficult (Expert) level trail at Lebanon Hills.
The Most Difficult trail that starts at #212 has been known as the X Loop for many years. It is about a mile of trail that starts with a large log pile. This is to test your skills and readiness for what is to come. The rest of the X Loop has more logs, drops, rock rides, and some nice twisty trail sections. To get to the Extremely Difficult trail you must enter the X Loop. Many riders make a loop by combining the X Loop and XX Loops, going from #212 to #213 then back to #212. These are called stacked loops and can be ridden as many times as you want. Another available loop is taking a right at #213 (X-Out) and #216 (X-Return) on back to #212.
There are a few other black trail segments at Lebanon Hills that are not shown here.