Originally Posted by
DrIsotope
The rules state that the ride "cannot be a loop," so I think that would exclude any kind of track.
"Rides cannot be loops. The descent must be via the same road unless you are prevented from doing so (e.g. one-way street or one-way trail). This is to prevent kinetic gain sometimes afforded by a loop, or an ‘easier’ descent."
I was thinking my driveway. Yes it would be a loop but really, just an out and back with a driveway width U-turn at each end and a an extended straight climb of about 1". 3' elevation gain so roughly 9600 laps.