This advanced marathon plan assumes a starting fitness level of easily being able to run 42 miles per week with at least a 14-mile long run. It starts off running six days per week minus a few easier weeks. It maxes out at 56 miles per week with two 20 milers. Level Advanced Target Marathon Time ~3:25 to ~3:45 Weekly Mileage Progression 43, 46, 48, 49, 51, 40, 55, 55, 56, 50, 35 Long Run Progression 14, 15, 16, 16, 18, 18, 20, 18, 20, 17, 10 Written by Coach Cory Smith