This 4-week marathon training plan is designed to support runners of all levels, with clear programs for sub-5, sub-4, and sub-3 hour goals. It provides structured weekly workouts, smart pacing guidance, and race-focused sessions to help build endurance, improve fitness, and prepare confidently for race day. Whether you are training for a marathon or simply looking to get in better shape and increase endurance, this plan offers a clear, effective, and motivating path forward.