A mountain bikers paradise. The Slickrock Bike Trail in the Sand Flats Recreation Area, near Moab, Utah is a world famous bike trail through an amazing landscape of sand dunes and eroded remnants of ancient sea beds. The 10.5-mile loop is very challenging with steep side slopes and narrow ledges and takes most riders 3 to 4 hours to complete. Riding season is best between mid-February and November, though take care to shred in the early morning or evening hours since temperatures can exceed 100 degrees Fahrenheit. An ambitious trail for the experienced mountain biker.