Sisters Stampede on 40mm tires?

Soundwave

2017-05-21

I'm thinking of doing the Sisters Stampede but the only appropriate bike I have is a steel cross bike with 42mm tires on it. I know a lot of central Oregon has flowy singletrack, but just how technical does the Stampede get? If it's doable, would it even be fun or not worth the hassle? I'm totally fine with not being competitive and hopping off the bike when I need to, I just want to make sure I don't cause damage to my tires or wheels by trying something not suited for the race.

Thanks!