Rocket:
Yep, I know that sleds can be fast. But I betcha you'll have a difficult time getting permission to run on the Salt -- because of the fragile nature of the surface if nothing else. Snowmobile tracks wear the surface of paved roads (where the trail crosses the highway), and the runners/skis won't help the salt stay firm and hard, either.
I don't think you'll easily convince the "officials", including BLM, that you won't do major harm to the racing surface.
But hey, give it a try. See what they say. . .