Hi NewCycler, welcome to the forums!

I also would suggest a hybrid, for the reasons D*Alex mentioned.

I've done the MS rides a few times on my hybrid, and it was no problem. I've got it set up with thinner tires than it came with, and aero bars (additions to the handlebars that allow you to get into a more leaned over aerodynamic position), but other than that it is stock, and has served me well on the road and light off road on paths, for 7-8 years now.

I do also have a road bike that I use on longer rides now, I didn't have it when I went on the last MS ride.

BTW, I wouldn't describe the MS ride as a race or marathon. It's the type of ride you can do at your own pace, the important thing is to get there. Some people turn it into a competition, but that's their choice, other just go with the flow.