BLACK FRIDAY Unlimited Open Play Sale is Here!

Jun 5 - July 28

Summer Ninja Camp

Sign Up Now

St. Louis Gym Hours

Kids Classes
Mon-Thu:4:30 pm, 5:30 pm, 6:30 pm
Fri:4:30 pm, 5:30 pm
Kids Birthday Parties
Sat:12:40 pm – 7:20 pm
Sun:12:00 pm – 7:20 pm
Open Gym
Mon:7:30 pm
Fri:6:30 pm
Sat:10:00 am, 11:00am
Sun:10:30 am, 11:30am

First class is always free!

Call (636) 206-8550 to claim your free class.

Ultimate Ninjas St. Louis

Kids Fitness Classes

If you're looking for a fun, unique, confidence building exercise option for your child, look no further! Ultimate Ninjas St. Louis (located in Chesterfield, IN) provides an amazing opportunity for kids of all ages, providing not only exercise, but helping them build self-confidence, develop agility, learn to over come obstacles, and prepare them 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. Challenge yourself.

Be Awesome. Have FUN!

New Client Sign Up
Returning Client Sign UP
Learn More
O'Fallon Ninja Gym | Kids Birthday Party & Fitness Programs

Family Open Gym

Looking for something active, fun, and safe to do with your kids? How about an exciting, challenging evening of Ninja fun - a unique combination of exercise, agility training, and strength building all while gaining confidence in a fun, safe environment.

Check out our family open play days! We provide a fun and challenging way to help your kids get out all of their energy while tackling our obstacle and agility courses! Practice and explore a variety of obstacles, fine tune your skills on a single obstacle, or practice running our customizable courses.

New Visitor Sign Up
Returning Visitor Tickets
Learn More

Make your kids birthday party AMAZING Ultimate Ninjas St Louis!

We are one of the best destinations for kids birthday parties! Our unique, active party place is the perfect choice to keep your guests entertained, and provide a healthy, exercise-rich environment for adults and kids alike! Take full advantage of your very own indoor obstacle courses, private party room, with optional pizza & drinks!

Planning a birthday party has never been so easy, check out our online reservations, and reserve your date today at Ultimate Ninjas!

New Client Party Booking
Returning Visitor Party Booking
Learn More

Ninja Camp is Cool!

Ultimate Ninjas Camps are designed to teach the techniques used to conquer any obstacle - and we have several!

Our focus is on getting fit and having FUN while building endurance, strength, coordination, and learning how to quickly and safely maneuver through various obstacles.

Camps include:

  • Obstacle Stations
  • Working on technique
  • Games
  • Courses
  • Open play

Camps are designed for ages 5-16. 


First Session: $50
Week Pass: $225
20% Sibling Discount

Must call to receive discount (636) 206-8550

Book Now
Learn More

Summer Camps

Looking for something AMAZING to offer your kids over break? Send them to Ultimate Ninjas Camps, where they will learn how to tackle obstacles as seen in the hit TV show American Ninja Warrior. At Ultimate Ninjas it's so much fun to get back up and try again.....

At Ultimate Ninjas, we instill self-confidence, acceptance, and a true hunger for tackling obstacles with a positive mindset. The best part: we have a BLAST doing it! The camps are designed by 3 time American Ninja Warrior Jesse Labreck, you will not find a more positive environment where kids can show up, be valued for exactly who they are, and discover what they are uniquely capable of achieving.

During camp, kids are grouped together by age and rotate through stations where they are coached on each obstacle. After learning how to tackle the obstacles, they have time for open play so they can pick their favorites and spend extra time on the obstacles they want to master or just enjoy! At the end of camp all kids will get a chance to run through the course with their coaches just like you see on TV!


$45 for your first session, each additional session for that week is $40 | 50% sibling discount

Summer Camps

June & August
Camps | Mon-Fri
All Day
Camps | Mon-Fri
Morning Only
Register Here
Rob Hess
Rob Hess
Fun and engaging place for kids to learn balance, coordination, and perseverance
Nicole Chong
Nicole Chong
Clean...great for kids.
Sandra Jacobs
Sandra Jacobs
Staff is caring and works to help all students be successful-a positive environment!!
Chantilly Apollon
Chantilly Apollon
We were visiting from San Francisco and my aspiring junior ninja had a fabulous time during open gym.
Emily G
Emily G
My family visited Ultimate Ninjas Libertyville for a birthday party. I was very impressed with the service, instruction, and attention the kids received while on the Ninja course. The birthday attendants kept close watchful tabs on the kids to ensure everyone's safety and got an ice pack for the birthday boy when he bumped his head. 40 minutes on the warped wall (several different heights), then 40 minutes on the Ninja obstacle course plus basketball and a fun game of dodgeball, and then 40 minutes in the party room. The attendants kept the kids busy on the obstacle course, were attentive and taught the kids the game of dodgeball, and were super helpful in helping with the party (carrying the cake to the table, passing out anything needed by the parents, and helped me take down decorations! I was very impressed with the service compared to other kids party places I have visited. I would hands down recommend this place for kids birthday parties! My kids loved it here! Make sure to check out the different walls throughout the facility with large photos of famous America Ninja warrior contestants and kids at the gym. Super cool place, for kids and parents alike!
Lisa Somogyi
Lisa Somogyi
Amazing place to take kids

Adult Fitness

Join a community of people coming together to pursue their passion for movement and to help each other become better. We welcome those who are looking to be part of a supportive community that will inspire you to break limits and achieve things you previously thought impossible.
New Client Sign Up
Returning visitor Sign Up
Learn More

Meet Our General Manager

COVID-19 Safety Procedures

We are thrilled to be returning to a sense or normalcy!
Our top priority is the safety of the community we have here in St. Louis. We will continue to operate in accordance with the county's current guidelines.

What our customershave to say about us

We just threw my daughter's 6th birthday party here and it was wonderful! They were very helpful and accommodating. Our guests had a great time and the staff assigned to help our party could not have been nicer. I would recommend this for a party venue (or just a fun open play/class activity) to anyone!Hannah B.
Yesterday was an awesome day! Ivan had a great run and placed 2nd. And he manifested that he would get on the podium today and he did!His confidence continues to soar and we love watching him in his element.Ultimate Ninjas St Louis has been a happy place for our family. It has been a wonderful supportive community of people who want to see everyone win.These athletes support each other like no oth. Carrie Chick-Schmitt