This may be the most popular trail in Moab. It’s very close to town, not too long, challenging in a fun way and amazingly scenic. If you only have time for one difficult trail, this is the one you want to do. The trail is intertwined with the Slickrock Bike Trail. Be very careful at crossing points and remember that bikers always have the right-of-way. There is a small fee to enter the Sand Flats Recreation Area.