90x60 track layout ideas?

[RC-Monster Mike]

One elevated picture and one from ground level. The track surface is a mix of sand, topsoil and stone dust, along with the clay/dirt that was there previously. The area was initially trees just like the area all around it, so there are some stumps, etc. buried in the ground, along with car-sized rocks! I have been working on it all spring, actually - getting so close I can almost taste it now!