I think it's possible. It's one of my goals, too.

I think it's a bigger goal (for me) to ride a heavy bike on a crushed stone, flat trail for 100 miles than riding the same distance on a fast bike on a smooth road that has some places I could coast a bit.

It will take me longer to reach my goal with the bike I ride and where I ride it. But that's fine. I've got time and I'll be enjoying it all the way.

I expect it will take me 8hours or so (with breaks) and it's on my agenda for next year sometime. It's going to take me a while to work up to it as I want it to be a challenge, but not torture.