You must be around the same age as me then. I remember the outline of the race course as myself and friends used to ride the course on other weekends other than the race days. A lot of the course is main trails that are permanent fixture, some of the singletrack link tracks can be a bit indistinguishable due to undergrowth or logging. The roller coaster is a permanent fixture.
There is a unofficial downhill course that we built as a group of friends during the late 90's on the other side of the main fire trail up from the paddock. We used to all meet up there 1st thing on a Xmas day morning before lunch when we were young. Perhaps we should build up a 'Memory map' log of where everyone 'thinks' where the outline of the course lies.
The chase classic was one of the fondest memories as a teenager.
Oh how I miss the giant BMX track of the Chase now I live down south.