Moving Up From the 10k to Half Marathon

September 6, 2025

Moving Up From the 10k to Half Marathon

TRA Writer 

Staff

Training

In this article

After completing a successful 10K, one runner wonders if she can go from 10k to half marathon in 6 weeks?

Can You Train for a Half Marathon in 6 Weeks After a 10K?

You’ve just crushed a 10K—congratulations! Now, you’re eyeing a half marathon and wondering if six weeks is enough time to get race-ready. The good news is that if you’re already feeling strong from your recent 10K, you’ve built a solid foundation, and with focused preparation, it’s possible to make the leap. A half marathon is roughly double the distance of a 10K, but with a smart and adaptive plan, like The Running Algorithm, you can get there.

Is Six Weeks Enough?

The answer depends on where you’re starting. If your 10K performance felt solid, you’re already halfway there. Building on this foundation with an intentional six-week training plan can prepare you for the challenge. The Running Algorithm offers an adaptive approach that fits your timeline and training history, making it ideal for situations like this.

How The Running Algorithm Can Help You Succeed

Traditional training plans often require 12 weeks or more to prepare for a half marathon, but The Running Algorithm takes a personalized approach. It tailors your workouts to meet you where you are, whether you’re starting from scratch or jumping into a shorter timeline. Here’s why it works:

  • Custom Progression: The program builds on your existing fitness level, ensuring you safely increase mileage and intensity without risking burnout.


  • Flexible Scheduling: Whether you’ve trained sporadically or consistently, the algorithm adjusts to fit your availability and goals.


  • Prioritization of Key Workouts: With a condensed timeline, every workout matters. The system focuses on the essentials: long runs, tempo efforts, and recovery days.


  • Real-Time Adjustments: As you log workouts, The Running Algorithm recalibrates to keep you on track and ensure you peak on race day.

What Your Six Weeks Might Look Like

While the specifics will vary depending on your current fitness, here’s a general breakdown of what a six-week plan could include:

  • Weeks 1–2: Transition from 10K training by mixing moderate runs, one long run (around 6-8 miles), and active recovery days.


  • Weeks 3–4: Increase your long-run distance to 8-10 miles while adding tempo or interval workouts to boost speed and endurance.


  • Weeks 5–6: Peak with your longest run (10-12 miles) before tapering. The taper allows your body to recover and feel fresh for race day.

Tips for Success on a Tight Timeline

  • Listen to Your Body: Avoid overtraining by paying attention to fatigue or soreness. Recovery is as important as the workouts themselves.


  • Fuel Smartly: Longer distances demand a fueling strategy. Practice eating or hydrating during long runs to find what works for you.


  • Prioritize Long Runs: These are crucial for building endurance and confidence. If life gets in the way, skip other runs—not the long ones.


  • Take Rest Days Seriously: Rest is when your body rebuilds and gets stronger. Make sure to stick to rest days for optimal performance.

So, Can You Do It?

Yes, it’s absolutely possible. If you’re motivated and willing to put in the effort, six weeks is often enough to prepare for a half marathon, especially with the tailored guidance of The Running Algorithm. While it won’t be easy, a structured approach can help you make it to both the starting and finish lines with confidence.

Ready to get started? There’s no time to waste. Let The Running Algorithm guide you every step of the way, helping you build toward your half marathon goals in just six weeks.

Enjoy the journey—and good luck!

Start training for your goal today

Start training for your goal today