The Challenge isn’t just a list of race distances: it’s a personal journey, rite of passage and a pathway to total transformation. Whether you're chasing your first 5K or eyeing the brutal beauty of a 100-miler, each milestone is a step deeper into who you can be. It doesn't matter if you walk, run or roll through each race. You can do this.

You in?

I'm not just telling you about this manic list of running demands, I'm doing it too.

Here's the record of my journey so far:

All Chapters Of Sendō: The Challenge | Sendō

It’s the adventure of a lifetime. You in?

Sendō Trail Running

It's dangerous to go alone: take this collection of free training programs, tools and other resources that we've developed over the years.

Research | Sendō

Everything I’ve learned about running in one place.

Sendō Trail RunningSendō Midori

Here's some of what you'll find in the Research Library:

Running Programs

5K Training Program | Sendō

Here’s an 8-week training plan to help you prepare for a 5K race. It’s suitable for beginners or those looking to improve their 5K time.

Sendō Trail RunningSendō Midori

Marathon Training Program | Sendō

Here’s an 18-week training plan to help you prepare for a marathon race (26.2 miles). It’s suitable for beginners or those looking to improve their marathon time.

Sendō Trail RunningSendō Midori

Strength Programs

Physical Training Program I: Bodyweight Circuit | Sendō

This 8+ week military-style basic training program combines calisthenics, cardio, core, and mental toughness exercises.

Sendō Trail RunningSendō Midori

Physical Training Program II: Dumbbell Circuit | Sendō

Dumbbells offer the perfect balance between control and resistance, allowing you to build strength, balance, and coordination through a full range of motion.

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Training Tools

Pace Calculator | Sendō

Pace Calculator: Enter the race distance and your desired finish time; it’ll tell you what pace you should maintain on average. Race Time Estimate: How long each race distance should take to complete based on your average pace.

Sendō Trail RunningSendō Midori

Meditation Timer | Sendō Trail Running

Find calm and focus with the Sendō’s Meditation Timer. Set a timer with gentle bells at the start, middle, and end of your session, and refresh your mind with rotating quotes of Eastern wisdom each time you visit.

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We can go further together. Here's how.

Party | Sendō

Every quest needs a party of heroes. You in?

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Sendō Run Club 🏃

If you're in Austin, Texas, join the Sendō Run Club. Our mission is to create a welcoming and enjoyable space for runners of all backgrounds, from complete beginners to seasoned ultrafreaks. Whether you’re looking to sharpen your race pace or just enjoy a fun run with friends, our gatherings are designed to accommodate all levels of speed.

Patrons & Sponsors 👯‍♀️

If you like what we're doing as an organization, you can also support us as a Patron (individual) or as a Sponsor (companies). Your support pays for content, training resources and community for people around the world. Your name and any information is included in the credits every chapter we send out, here on the Sendō website and in the credits of videos we release.

The Sendō Hall of Fame honors those who’ve gone beyond training to complete The Challenge — conquering every race distance from 5K to 100 miles. Each name here represents miles moved, challenges overcome, and a commitment to the long road of self-improvement.

Finishers receive official Sendō badges: both digital and physical. Their names are immortalized on this page, alongside personal stats, stories, and race photos. It’s not about being the fastest. It’s about showing up again and again, no matter what.

How Do You Get In?

To be inducted, you must:

• Finish all 8 Challenge races distances, officially timed and verified. We only accept results from sanctioned races. You can submit your race times and identification that matches with the name you're racing under. Apologies if you've PR'd at your friend's backyard ultra but there's too many folks getting goofy on Strava.

Hall of Fame Honors

Every inductee receives:

• A custom-forged Sendō Master Medal and special-edition Sendō Master training tee
• Your name, initial or pseudonym and race results added to the Hall of Fame
• A profile page with your full journey, highlights, photos, and race stats