So I just bought some property that came with about 0.5 acres of undeveloped land. It's literally forest, at least up until the d-bag that lived here before me cut down 5-6 60 year old trees. Anyways, that means that I can do whatever the hell I want with it, because nobody is going back there but me. So, I'd like to build a pump track. Problem is that virtually 75% of it is on slanted land. I have a good chunk that isn't too bad and I think can be made to feel flat, but the other part is really slanted. Every pump track I see is on flat ground, like parking lot flat. Are there any resources to making a borderline decent track that has changes in elevation?