Replying to Building rails

I live in a crappy area that has some pretty good hills, lots of AWESOME backcountry stuff, but no real parks. So I'm gonna take it upon myself to build one. I don't want to make this a HUGE thing, but I do have access to welding equipment if I need to. I would like some tips like how high, should I put any kinks in? What material (I don't really want to invest in steel pipes for my first rail if I don't have to) will wood or pvc work? How should I put it in the ground so it's stable?

Thanks


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Screw this I'm going skiing