Here is a video I found from my first race in Samsula.
It was taken by another beginner in my line. It was misty out so his lens got wet and the quality starts to suffer, but you get an idea of the terrain and tightness of the course through the woods.
The rider won the beginner class at this race, and thus was promoted out of beginner. One win in beginner is all you're allowed.
The bikes in the lines in front of us that you see him passing are the Evo classes. These are older bikes that must be air-cooled with drum brakes and I think some other specifications.
*EDIT* watch the very end of the video, he hits a tree. see, I told you so!