The Extremely Difficult trail, also known as XX or Red trail, is also primarily located in the middle of the park. To reach this area, you must ride the More Difficult loop and much of the Most Difficult trail. There is one smaller sections of Extremely Difficult trail in the Most Difficult loop. These areas are for the most experienced riders and feature harder logs, unavoidable rock rides, log step ladders, and higher/thinner 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 1.99 miles of Extremely Difficult trails at Lebanon Hills.
The Extremely Difficult trail that starts at #213 has been known as the XX Loop for many years. It is just over a mile of trail that starts with a taller log pile followed by a very rocky section ending with a rock ledge drop. This is to test your skills and readiness for what is to come. The rest of the XX Loop has more logs, drops, rock rides, man-made features, and some signature log ladders. 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.
Check the official Lebanon Hills web site here
for more details, photos, and information.