No trail can be 110% sustainable. But if all trails were built to be as sustainable as possible, and then the races were spread out across them rather than racing the same loop at the same place every single time, then the overall wear to your local trail would be minimized.
No, You'd just end up trashing the whole place + all the other track in the state.
Most 'Race Tracks' are built on private property, not really with sustainability in mind, look at what happens after a race, the place gets trashed.
Sure, I'm a racer, and I love having races in more and more exciting places every year, but there is a line, and a type of trail, that should be enjoyed, and doesn't actually need racers pinning along it.
Think of Stonefly? As Jacobs told me, the place was built to enjoy trailriding on, he told me he would never like to see a race held on it again.
I feel Buxton is the same.
Or we could actually make the State series in Summer, and we wouldn't have as big of a problem!