This Half Marathon training plan (10–16 weeks long) includes our tried-and-true, scientifically grounded McMillan workout progression designed specifically for newer or lower-mileage runners. You’ll improve your endurance through gradually progressing long runs, build stamina with specialty half marathon workouts, and perform carefully placed goal pace sessions to dial in your race pace with confidence. Throughout the plan, you’ll complete predictor workouts that help determine your best pace ...