How Many Miles A Week To Train For Marathon

Training for a marathon is an incredible journey that requires dedication, discipline, and a strategic approach. As an avid runner who has completed several marathons, I understand the importance of building a solid base and gradually increasing mileage to reach peak performance on race day. In this article, I will delve into the question of how many miles a week one should train for a marathon, sharing personal insights and providing detailed guidance.

Understanding the Marathon Training Process

Before diving into the ideal weekly mileage, it’s essential to understand the overall marathon training process. Typically, marathon training plans span a duration of 16 to 20 weeks, consisting of several phases. The initial phase focuses on building an aerobic base and gradually adapting the body to increased mileage. As the training progresses, longer runs, speed workouts, and tapering periods are included to optimize performance and minimize the risk of injury.

Starting Point: Assessing Your Fitness Level

When determining the appropriate weekly mileage for marathon training, it’s crucial to assess your current fitness level. If you are a beginner runner or have limited running experience, it’s advisable to start with a conservative approach. Aim for a weekly mileage of around 20 to 30 miles, focusing on building endurance and establishing a consistent running routine. This will allow your body to adapt gradually and reduce the risk of overuse injuries.

On the other hand, if you have more running experience and a higher fitness level, you may be able to handle a higher weekly mileage from the start. Aim for a range of 30 to 40 miles per week, gradually increasing it as your body adapts to the demands of marathon training.

Progressing Towards Peak Mileage

As you progress through your training plan, it’s essential to gradually increase your weekly mileage to prepare your body for the marathon distance. The general guideline is to aim for a peak weekly mileage of around 40 to 60 miles, depending on your experience, goals, and overall training plan.

However, it’s important not to become fixated solely on mileage. Quality workouts, such as tempo runs, intervals, and long runs, play a crucial role in marathon preparation. It’s important to strike a balance between mileage and incorporating these key workouts in your training regimen.

Listen to Your Body

While having a target weekly mileage is important, it’s equally vital to listen to your body throughout the training process. Pay attention to any signs of fatigue, persistent soreness, or unusual discomfort. Incorporate rest days and easier weeks into your training plan to allow for proper recovery. Pushing through fatigue and overtraining can lead to burnout and potentially result in injury.


There is no one-size-fits-all answer to the question of how many miles a week one should train for a marathon. It depends on factors such as fitness level, experience, and training plan. Starting with a conservative mileage and gradually increasing it over time is a wise approach. Remember, the key is to find a balance between mileage and quality workouts, while always listening to your body and prioritizing rest and recovery. Happy training, and may your marathon journey be filled with personal achievements and unforgettable moments!