This Half Marathon training plan (10–16 weeks long) includes our proven, scientifically grounded McMillan workout progression designed specifically for the combo-type runner — athletes who respond well to a blend of endurance, stamina, and speed development. You’ll build endurance through progressively structured long runs, elevate your stamina with specialty half marathon workouts, and complete carefully placed goal pace sessions to dial in race pace with precision. With 1–2 quality sessions ...