The High Desert Trail System is made of three loops known as 1st, 2nd, and 3rd Mesas. These loops become progressively harder from 1st to 3rd. All three will be utilized for the different category's courses. Take a look at the 2007 Results page for an idea of how riders fared on last year's courses. This should give you some information

The 7 mile beginner course consists of a short, fast, and fun route from the start/finish line up the gravel road, around 1st Mesa, and back to the finish. This extremely fast course is very doable for riders of all ages and skill levels, but does boast slickrock, loose corners, and a couple climbs that will keep you honest. The beginner course is outlined in GREEN on the map.
Directions to Staging Area

See map for details:
Course Map
Elevation Map

The 19 mile Sport Course utilizes 1st, 2nd, and 3rd Mesas. In this category you will experience everything the High Desert Trail System has to offer. While very fast overall, out on 3rd Mesa you will be challenged by constant up and down terrain, serious switchbacks, and the kind of singletrack that doesn't give you much chance to rest. The sport course is outlined on the map in BLUE
Directions to Staging Area

See map for details:
Course Map
Elevation Map

The 31 mile expert/pro course is exactly the same as the sport course but riders will be doing two laps on the 2nd and 3rd Mesa. As the name of this category implies this is a pretty serious course. Riders will be doing two laps on the toughest and slowest loop of the High Desert Trail System. There are harder rides out there, but this course is worthy. The expert/pro course is outlined on the map in BLACK.
Directions to Staging Area

See map for details:
Course map
Elevation Map