No Franz it's definatly Not all singletrack. Fire road climb, majority downhill is singletrack, the beautiful, rolling curvy stuff, that is like candy to sugeraholic. No real nasty stuff. I would think you could put some knobbies on your cross bike & clean all of it, i dont remember any chewed up sections. make sure you have newer batteries...

you have till june 1st to fix up your mt. bike. I'd love to pre-ride the course during the day soon, then you could take the cross & see if you like it. maybe paul remembers something that would be hard on a cyclo-cross bike?
Gern