This Boston marathon training plan (up to 12 weeks long) includes my tried and true, scientifically-based and proven marathon workout sequence to help athletes running Boston.   Quick Facts: -Length: 8-12 weeks -Runs per week: 4-7 -Key/Hard Workouts per week: 1-2 -Cross-training days per week: 1-2 -Garmin Structured Workout Compatible -McMillan Calculator paces integrated into all workouts -Geared towards the Combo Runner Plan includes: -Tried and true, scientifically-based and proven ...