This is a 16 week, time based advanced level marathon training plan designed for someone trying to run a marathon PR. You should be comfortable running at least 5 hours a week, with five days of running per week prior to starting this training plan. There are two to three speed workouts per week, and a long run weekly on Sundays. All workouts are time based and there is no need for access to a track for the speed workouts. Marathon pace workouts are incorporated into the long runs through out the training program. The long runs top out at 3 hours and highest weekly volume is 8:30 of running time. There is additional cross training and strength training time built into the program. Fridays are a rest day from running to allow for recovery. There are also two recovery weeks with decreased intensity and volume.