This downhill marathon training plan (up to 12 weeks long) includes my tried and true, scientifically-based and proven marathon workout sequence to help athletes running a hilly marathon (e.g., Boston Marathon).  If your marathon has a net downhill, then this plan is perfect for you. The plan is geared toward the speedster type of runner. You'll still improve your endurance with progressing long runs and boost your stamina and speed with my marathon specialty workouts but I've tweaked this ...