I found this and it sounded interesting:
http://www.pedalingproductions.com/ramblearoundprattsburgh.html
It says mountain bikes/cross bikes only. The whole course seems to be on roads, but most of the roads are dirt roads/seaonal use roads/tractor trails. The description mentions easy single track, but following the write up of the course, I didn’t see where there were any. Maybe on the shorter courses?
I am planning on riding my mountain bike, but will put on narrower cross tires. I currently have a pair of Panaracers that are 26×1.25. But there isn’t much tread on them. They are more road tires. They might work though. I ordered a pair of Schwalbe CX Pro Sport 26×1.35 tires. There are more cyclocross tires with a knobby tread. These would probably work pretty well. I will probably try mounting these and see what kind of rolling resistance they have.
I will probably try mounting my aerobars as well. I haven’t used them on my mountain bike yet.
Check out the course profile:
http://www.pedalingproductions.com/ramblearoundprattsburgh30milemap.html
It should be fun.

you’re gonna need that mtb.
areobars might just help.
I rode the course and it’s no
joke. there are many places where
a mtb(29er) will excell, and a few where
a cross bike will roll out…
Plan on 3 hrs on the bike
good luck to all.
Comment by Chad — April 12, 2008 @ 5:46 pm
I got my bike mostly set up. I am waiting for a pair of Shimano M520 clipless pedals to come. It will be an adventure. I have been using clipless pedals on my road bike while spinning on a wind trainer. But never outside on the road, and never on the mountain bike. I have used the aerobars on my road bike, but again only on the wind trainer.
I mounted a 2nd bottle cage. The bike wasn’t fitted for one, but I mounted one using a couple hose clamps.
3 hours…hmmm… I have never ridden my mountain bike that far or that long. Must be a tough course. It will be fun.
Comment by Rob — April 13, 2008 @ 8:31 pm