The 40 week plan starts just under 40 miles and holds steady at 40-45 miles the rest of the way (until the taper). It includes 5 days of running with 2 SOS days per week. There are a few 6 day weeks, but you can easily add to your other easy runs during the weekdays to take that 6th day out. The plan comes with a structured workout feature and day to day pace guidance based on your goal time.