East of Moab, the Whole Enchilada is a rugged 27 mile route that links up several trail systems. While the Whole Enchilada does descend 8,430 feet, this doesn't come for free; there is 2,215 feet of climbing along the route.
The Whole Enchilada route starts atop Burro Pass and drops through aspen forest on the way to red rock pinyon and juniper desert. The Whole Enchilada actually combines four major trails: Burro Pass, Hazard County, UPS/LPS and Porcupine Rim. The route ends down at the Colorado River along SR128, and then its is a five mile roll back into Moab. Be prepared for temperature extremes - you could start up near snow in the high alpine region and roll back to town in over 100F desert.
The route down from Burro Pass and through Hazard County are sweet winding singletrack. Hazard County is a little more rocky and rutted. UPS/LPS is winding redrock singletrack with big exposure as it runs a long cliffline. The toughest stretch is probably the 4-5 miles of rocky doubletrack along Porcupine Rim, before it turns into flowing singletrack for the final descent to the Colorado River. That doubletrack section is a beast since its usually where you’re really exposed to the heat.
Pretty much all of the mountain bikers use one of the Moab-based shuttle services to get up either the Burro Pass or Hazard Country trailheads, depeding upon snow levels. All of the shuttle companies are all about equal. Definitely get a very early shuttle up to minimize the heat exposure on the lower ends.
Overall, Whole Enchilada is the 61st most popular mountain bike trail of all 73 mountain biking rides in Utah.