From 13.1 to 26.2: The Beginner’s Blueprint to Marathon Success

If you’ve conquered the half marathon and are now eyeing the full 26.2 miles, you’re in the right place.

Making the leap from 13.1 to a marathon is no small feat, but your experience with half marathons gives you a solid head start.

This phase of your running journey is all about avoiding burnout, minimizing injury, and soaking in the excitement of new milestones.

Training for your first marathon requires more than just doubling your effort it’s a whole new game.

The tips below are designed to guide you through this transition with insight, intention, and inspiration. Let’s dive in.

Is Running a Marathon Just Twice as Hard as a Half?

Not even close.

A better estimate? It’s about 3.5 times as hard. That’s not meant to scare you, but to help set the right expectations.

After more than a decade of coaching, I’ve seen countless runners make the transition and the most successful ones know what they’re getting into.

Here’s what you should focus on as you shift from half marathon training to preparing for the full marathon distance.

1. Worry Less About Pace, More About Time on Your Feet

Speed can take a backseat for now. Your goal should be to build endurance and get your body comfortable with spending long stretches on the move.

During the heart of marathon training, your body is adapting to extended stress and learning to efficiently tap into fat as a fuel source something you won’t achieve by constantly pushing pace.

Keep these in mind:

• You don’t need to hit a specific pace to be marathon-ready
• A year of consistent running is a good base before going for 26.2
• Embrace walking breaks it’s still solid training
• Practice pacing by effort, especially outdoors

2. Break the Training Plan into Phases

First-timers typically follow a plan that lasts 18 to 24 weeks. That’s a long time to stay fired up, especially when the finish line is months away.

A great strategy? Set a midpoint goal like a tune-up half marathon.

It gives you something to train for in the first half of your plan while ramping up mileage and keeping things exciting with some speed-work.

Need help choosing the right marathon training plan? Start with one that suits your lifestyle, goals, and schedule.

3. Fueling: Start Testing Early

Your body has enough glycogen to handle around 20 miles, which is why you probably haven’t hit the wall in a half. But in the marathon? Fueling becomes essential.

Without proper fueling, you're likely to:

• Increase your injury risk
• Struggle through workouts
• Recover more slowly
• Feel hungrier on rest days

Practice your fueling strategy now. This includes long runs and even during hard workouts. Most runners aim for 30–60 grams of carbs per hour.

Things to test:

• Which energy gels, chews, or drinks your stomach tolerates
• Whole food options like dates or homemade fuel blocks
• How to carry and sip water during long runs
• Using electrolytes to prevent dehydration and boost performance

Fueling before and after your runs matters too. Eating well around your workouts will improve recovery, reduce inflammation, and make training feel smoother.

4. Long Runs Are Non-Negotiable

Your long run each week is the cornerstone of marathon prep. But when you’re looking at the plan, don’t get overwhelmed by what’s 4 weeks away.

Focus on this week’s goal.

Key reminders:

• Never skip your long run it’s the most important session
• Celebrate each time you run farther than ever before
• Long runs are where the mental battle begins train your mind as much as your legs
• Learn the difference between discomfort and real pain
• Progress feels real when you finish 17 miles and realize you’re still standing

5. Don’t Go It Alone

There’s something powerful about running solo but there’s also magic in sharing the journey.

As your long runs stretch beyond anything you’ve ever done, it can be motivating to have company.

If you don’t have a training buddy going all-in on marathon prep, ask a friend to bike alongside or join you for a few miles.

Even a running group can make a huge difference in accountability and enjoyment.

Nervous about joining one? There are plenty of ways to ease in and find your fit.

6. Embrace the Process

There will be tough runs. There will be moments where you question yourself. But one off day doesn’t define your training.

Sometimes fatigue, stress, or even an oncoming cold is to blame.

Listen to your body.

Most importantly, keep in mind why you chose this challenge in the first place. Let go of rigid expectations and enjoy the ride.

Every week you’re becoming stronger, mentally and physically.

You’re training for something extraordinary. Don’t miss the chance to appreciate each step.