My First Sanctioned Marathon

In two days I will run in my first sanctioned marathon, the Top of Utah Marathon, in Logan. I've run in a couple of other races that weren't as longer, but harder because of the climbing involved. I've also run marathon lengths on a couple of other occasions, but in none of these have I run the full 26.2 miles at marathon pace. My biggest worry is whether I will be able to maintain the pace I want to run for the full distance. I'm not worried about finishing, I just want to do it in my goal time of 3 hrs 15 min. Keep your fingers crossed.