Hey Cale, it's great to see an mtm veteran like you trying this sort of track... and succeeding. I'm not sure what more you have planned but there's a number of things I can think to say.
What really impressed me is that you seem to understand how to carve terrain. The way you've formed the terrain on many jumps in order to keep the nose of the truck down is excellent, keeping the nose down on jumps is an ideal. You have a section with a motocross kind of feel that has great flow.
You've done a great job at terrain transitions throughout the track, and while the distances are long they are never completely boring or without some variety. However, one thing you've done that is common to rookies is making stretches of road too long (even with my prior comment in mind) and ending up with a track that feels too long for what it is. It's matter of "scale", and it's pretty easy to work at too big a scale in the editor. Overall I think the road width is a good choice, though the distances traveled are perhaps too great. I'm not suggesting you change anything, I'm only wanting to point out this aspect of track design.
Also, the track seems kind of sterile (time + distance may play a part). Your choice of models is nice, and the arrangement isn't bad, but what would really maximize their impact would be to incorporate them into the course itself, so that you drive through and among them, rather than having them as roadside attractions, sometimes too distant to appreciate.
The minimalist terrain textures are a fine start, but knowing your painting skills from your truck work I know you could do better, or add more for variety, but I'll leave that be for now - I realize this is all kind of experimental, but I do intend that as a compliment rather than a complaint.
You know what you're doing in the editor so I see no reason why you shouldn't use your own checkpoint boxes instead of the stock bins. Doing so will enable you to make them the exact height and breadth of your checkpoint markers (if you like), as is there is at least one CP that gets jumped over consistantly. <i><a href=viewtopic.php?t=1980 target=cp>Details here</a></i>.
Criticism aside, this track is an incredibly fine start and I hope to see you continue to make tracks, as you refine your skills!
...and the name is quite clever.