There is no trail map that I know of (the only known map was swiped out of the kiosk at the main trail head).
I posted trail by trail, inch by inch, extremely explicit, impossible to get lost directions in a thread called, coincidentally, "Jungle Habitat" on mtbr.com in early October. Search and find that and there's no way you can get lost following the racecourse.
I'd check on local conditions first before starting out at this time of year.