We are the ORIGINAL CrossFit Affiliate in Lake St. Louis

Come give us a try.  The first week is always free. Our programming is effective and fun!

Established in 2013, we have years of experience and expertise to guide you, no matter your goals.

Trenches & DASA 5th Annual Fundraiser

What: Workout for a Great Cause
Date: Saturday, April 13
Time: 7:30 AM
Place: CrossFit Trenches
Cost: FREE


On Saturday, April 13, 2019, CrossFit Trenches and the Disabled Athlete Sports Association (DASA) will host the 5th Annual Athletes-4-Athletes Fundraiser. One hundred percent of the money raised will be donated to DASA’s FUNctional Fitness and Warrior Workout programs benefitting wounded military and athletes of ALL abilities. Join us for a free workout at either 7:30am or 9:00am. In addition to a great workout geared toward everyone, we will have raffles and door prizes to help raise money for this great cause!

Introducing BOOT CAMP!

Don’t delay! Get on your path to results today! Trenches Boot Camp includes a nutrition counseling session, fun, fast-paced HIIT workouts, great coaches, and tons of motivation to keep you on track and accountable! Click HERE for more information.

Trenches Services

  • CrossFit Programming
  • Nutrition Coaching
  • Personal Training
  • Boot Camp
  • CrossFit Teens
  • CrossFit Kids
  • Skill Seminars
  • Weightlifting Seminars
  • Mobility Clinics

Trenches Open/CrossFit Open

Click here to register for the Trenches Open

Click here to register for the CrossFit Open

Trenches Swag, Anyone?

Get your Trenches gear!  Click here for the online store.

Come See Us!

Interested in trying CrossFit? Your first week is always free! Come try it out with no obligation to join to see if CrossFit is for you! Call or text us at 636-344-0012, email us at, or use one of the buttons below to let us know you’re coming. We’d love to hear from you!

1 Week FREE Trial

Try CrossFit Trenches for free for one week with no obligation to join. Free trial expires one week from first class attended.

Drop In

Dropping in from out of town or another box? Click here to register and let us know you’re coming!

Happy Birthday!

Julie B            2/3
PC                  2/14
John B           2/21
Christina S   2/25
Andy T          2/28
Melissa P     2/28

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