Most the trails here are two track jeep trails. There is no real loop, just a bunch of tracks heading up and down the front of the mountain, connected along the bottom via the main dirt road and irregularly connected on top. Carry a Google Earth sat image to best make connections on the top. The far western edge of the trails/area is bounded by Chuluut Gol (or Am) (Rock Creek or Valley). It has a great two track trail up it. I have listed it as a separate trail here on Singletracks.
Also to do the out and back behind the camp, just politely push your bike through the camp to the back side where you will see a metal gate with just a chain wrapped around it (no lock). This is about 1.5 mi (2.5 km) climb up the mountain to a upper ridge (traveling SW, W, NW). Get to the top, rest and then turn around and blaze back down the mountain.