The Upper Middle is a short spur of Middle Middle trail and is one of the hardest quarter miles for off-roading in Colorado. There are a total of 6 obstacles and it is for extreme rigs only. It has vertical waterfall climbs and huge boulders covered in dust. Rigs should have 39” or bigger for tires, winch, front and rear lockers, roll bars, and other safety equipment. Prepare for breakdowns.