Track???

[s-maxxKILLSALL]

Hi, My name is Josh and i am building a track in my back yard. My problem is that every time i build a track newhere else other dirtbikers tear it down so i have decided on building one in my back yard. Does anyone have pics of thier tracks? If so please post em'. If not just some tips on building one would be nice. PS its not that big of a back yard. maybe like 1/4 an acre. :p