Hell’s Revenge is a very popular trail in Moab and with reason to be. It is a super fun trail and a great way to experience the off-roading terrain in Moab. The trail intertwines with Slickrock Bike Trail so be cautious and courteous of bikers. There is also a fee to enter the Sand Flats Recreation Area. Most of the obstacles are large ledges and steep sections of slick rock. There are a few extreme obstacles that are optional.