we used to have a similar race here in CO at Sol Vista called the Triple Dhip. Race the rad dh trails, combined times are judged. Very popular BITD as I recall.Nailed it.
WTF is so hard to understand about this?
Pick a lift serviced hill.
Pick a bunch of DH trails.
Time a run down each one.
Lowest combined time down wins.
All you gotta do is formalize and structure what huge numbers of us do with our buddies all summer.