Taper?

I looked at my plan for the week, and although I only run 15 on Sunday, I will run 45 miles this week. Maybe I taper next week. http://www.runnersworld.com/article/0,7120,s6-238-267--14549-0,00.html?cm_mmc=NL-TrainingExtra-_-1046408-_-09182012-_-The-Perfect-Snot-Rocket