This advanced marathon plan assumes a starting fitness level of easily being able to run 30 miles per week with at least a 10-mile long run. It starts off running five days per week and, by week 5, increases to running six days per week, minus a few easier weeks. It maxes out at 54 miles per week with two 20 milers. Level Advanced Target Marathon Time ~3:25 to ~3:45 Weekly Mileage Progression 30, 32, 33, 35, 42, 45, 32, 45, 47, 45, 51, 52, 45, 54, 54, 49, 35, 42 Long Run Progression 10, ...