I was there for a pro national in '09 (the first year). The week before for practice it was an easy track, for the national they changed it all up and it was pretty knarly. They have a fun rythem section, a lot of small tabletops, 1 bigger tabletop, and a huge double on the far straight. I hear the double is tamed down now because it is packed in better, but for the '09 national it was really sandy, and deep ruts. I crashed on it from hitting it too hard (it's a short face when I was there so I was on the gas to hard and I wheelied into the face then it nose dived me). I gotta say that was about the worst case scenario for that jump, I landed head first, bike on top of me and after a 9 months I healed so no worries! haha. Actually, I hit it probably 15 laps perfect and 1 lap I made a big mistake so if you stay focused it's not a big deal. I jumped it first lap of practice too, so it's not hard but it can get you if you cross rut or hit it too hard. When I was their the amatuers raced the pro track (minus one deep sand section).
Besides the big jump, it's a fun, flowing track. It gets rough too, kinda a hard chop under a thin layer of sand. And yeah it was really hot, and the air is so dry blowing through the valley so you really got to hydrate well because it drys your mouth out quick.