Ultimate Ninjas Chesterfield

Youth & Adult Training | Birthday Parties |Open Gym Play | Obstacle Classes | Functional Fitness Classes | Corporate Events | Camps

Indoor obstacle course racing (OCR) for kids and adults. Whether class, event or open play, Ultimate Ninjas is the place for you to overcome obstacles - on and off the course!

Operating as usual


Come support one of our homeschool ninjas tomorrow during our morning open gym! She will be in the lobby from 10-noon selling some of her crotchet animals! We hope to see your smiling faces 😍

Photos from Ultimate Ninjas Chesterfield's post 03/12/2024

Our kids sure know how to have fun on and off the course! Camps are always a good time here at Ultimate Ninjas and we hope to see you for Spring Break Camp 💪🏻 Are you signed up yet?


Camp Fun!

Photos from Ultimate Ninjas Chesterfield's post 03/07/2024

We have spots available for both weeks of Spring Break Camp, Nerf Night, and our Batman Competition! What are you signed up for? Extra hours of open gym during spring break, too 😍 We can’t wait to see you!


We are so excited to launch our book series “I Can Be an Ultimate Ninja” starting with “Hit the Buzzer” in late March.

The story is one of overcoming obstacles inside and outside the gym and how to learn from failure and use it to fuel determination and perseverance.

We’ll be asking folks to join our launch team and receive a preview copy. Email: [email protected] if interested!


As a reminder, there is no open gym tomorrow due to our Beginner Competition 💪🏻 Our 3-5 year olds start us off at 10:30 and we have spots left all the way into our adult division that starts at 2:30! Are you signed up yet?


So much snow ❄️❄️ Stay safe and warm at home tonight- classes and open gyms are canceled and Nerf Night is rescheduled for next week! Please email us with any questions.

Photos from Ultimate Ninjas Chesterfield's post 02/15/2024

These coaches may not wear capes and rival superhero status, but they sure do make an impact on kids lives - all through fitness! We love seeing these reviews - makes our day. ❤️


Lots of good information!! Let us know if we can help get you signed up for anything 🫶🏻 YOU are the BEST part of our day!


Plan your next birthday party with us! A party venue where your party stays together and plays together! Our coaches even create the Ultimate Ninja course for your party! Visit our website to book now.


💪 Building Strength from the inside out! 🌟 We know these obstacles can be intimidating. We also know you can do more than you think you can. The more you practice and keep getting back up after you fall the more confident you will become in yourself and your ability to do hard things!


Happy Friday, friends! Are you signed up for our competition 2/18? Ages 3 all the way up to adults are welcome to put their skills to the test! Competition flyer is in the comments below 👇

Photos from Ultimate Ninjas Chesterfield's post 02/02/2024

Kids Night Out is tomorrow and we still have room for you! Sign up online or give us call 🍕

We are also hiring! Looking for coaches that have evening, and weekend availability. Please email us your resume and we would love to set up an interview!


Meet Silas! He is one of our Lil Ninjas here and he is working hard for his upcoming competition. Our Lil Ninjas classes help build so much confidence and strength- sign up for your free trial today!

Photos from Ultimate Ninjas Chesterfield's post 01/29/2024

We love hosting events in our gym. Whether you’re looking for a birthday party, field trip, or a P.E. class, we’ve got you covered.

Reach out to us directly to book your next event.


CSNA 10-11


Lots of fun things coming up! Are you signed up yet?


We love our community!

Did you know that we host open gyms for group events? Contact your local gym to schedule one today!


Our coaches are the most supportive, kind and encouraging people! Here at Ultimate Ninjas, we love helping our students build strength and confidence obstacle by obstacle. Do you have a favorite coach?


We are open for evening classes! If you decide to stay home all bundled up, please email us at [email protected] to schedule a make-up class. Stay safe, everyone!


Due to weather and road conditions our 10am and 12:30pm classes/open gyms have been canceled. Please stay safe and warm out there! *Status of our evening classes will be posted this afternoon!


Check out our Lil’ Ninjas getting some air with her coach Lauren! Head to ultimateninjas.com to see the availability of all our Lil’ Ninja classes.


Have you signed up yet? Our first Nerf Night is this Friday!! (Regular scheduled open gym from 6:30-7:30 is still on, too!)


Classes are as scheduled as normal this evening, but we would like to inform everyone that our parking lot has not been plowed. Please use caution and if you would like to schedule a make up class, please email us at [email protected]

Stay safe and warm!


No am classes Sunday 1/14! Open gym as normal 10:30-11:30 and 11:30-12:30. Stay safe and warm, everyone!

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Inspiring Kids and Adults with athletes from American Ninja Warrior!

Build self-confidence and prepare to reach higher than you ever imagined. Classes are designed and led by American Ninja Warriors who train to conquer the same obstacles seen on the NBC hit, American Ninja Warrior.

Our General Manager in St. Louis, Kirsti Pratt, can be seen on Seasons 7, 8, and 9 of the show. She loves riding her bike and hiking in nature with her dogs. Coach Kirsti says, “ One thing that I truly love is getting into deep conversation with how people think and their beliefs about the world or people. What I mean by this is truly taking interest in who they are as a person even if I just met them. I am very open-minded to other people's perspectives. This gives me the opportunity to share my love and passion which is fitness, happiness and health. The full physical, mental, emotional and spiritual that makes up a person, and how to work on balance and being the best you, you can be!”

We are so excited to be here in St. Louis to show kids and adults that FITNESS actually equals FUN with us!

Videos (show all)

Camp Fun!
Spider Man loves Ultimate Ninjas!
Here is a sneak peak of our competition today! We had so much fun and we are so proud of everyone 💪🏻 our ninja community...
Meet Silas and his friend Sprinkles! They both have been working super hard for their upcoming competition 🫶🏻
Meet Silas! He is one of our Lil Ninjas here and he is working hard for his upcoming competition. Our Lil Ninjas classes...
CSNA 10-11
Check out our Lil’ Ninjas getting some air with her coach Lauren! Head to ultimateninjas.com to see the availability of ...
Ninja VS Ninja relay race 🔥, some birthday party FUN!💪🏼 🥷
🚨Hitting a buzzer is such an exciting feeling! We are so proud of our ninja for getting a full clear at the WNL Competit...
🤩Who doesn't love to see new obstacles? One thing that is unique about the Ultimate Ninja gyms is you will walk in each ...




140 Long Road Suite 130
Chesterfield, MO

Opening Hours

Monday 10am - 8:30pm
Tuesday 9am - 12pm
3pm - 8:30pm
Wednesday 3pm - 8:30pm
Thursday 3pm - 8:30pm
Friday 9am - 8:30pm
Saturday 9am - 4pm
Sunday 9am - 6pm

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