That's a pretty fair distance for an MTB race... I'm usually racing that sort of distance as an expert. I'm guessing that it's due to the "pancake flat" aspect, and non-technical nature.

As others have said, make sure to pace yourself. BUT, do not go out too slowly, either. The first lap (or 5 miles-ish) should be at a HARD pace - this will give you the gap you need, and let you come down some for the remainder of the race.

Think hole shot - being the FIRST into the tight twisties is always best.

Hydrate, hydrate, hydrate! If you can't use a water bottle when racing (I can't), wear a SMALL Camel Bak and remember to drink. For 17 miles, you're going to be out for 1.5 hours or so - try to drink every 10 to 15 minutes. And every 30 mins, eat something. I find on the MTB, in a race, Clif Bloks work really well - just make sure you pre-open .

Most of all, HAVE A BLAST! And of course, let us know how it went.

Good luck!

SheFly