This California International Marathon training plan (up to 16 weeks long) includes my tried and true, scientifically-based and proven marathon workout sequence to help athletes running CIM. 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 plan to better suit the more endurance-oriented runner with a heavier mix of stamina and endurance runs. And, I've minimized the workouts that I've ...