I only did the marathon once. I also did a lot of trail running, in my area, to prepare.
The trail on Pikes Peak is nothing like any of my training. There will be a lot of high stepping, (like running tires for football practice) and a lot of stride change like running railroad ties on the train tracks.
And I'm not even going to get into the constant side to side trail cambre ! This is a love/hate race. You'll hate while doing it, but love it when you're done. ENJOY !!!