About Us

Serving The Castle Rock,  Larkspur, Lone Tree, Parker, Meridian & Douglas County Areas.

About Rocky Mountain Self Defense and Fitness

Rocky Mountain Self Defense & Fitness strives to be a family-friendly training facility.

We have highly skilled and competent coaches who care about their students. We don’t care about being the biggest gym in town or about putting trophies on the wall. We care about the personal success of each member of our entire gym.

Head Coach John Hallett has over 19 years of Krav Maga training & instruction. Jenny Jaeger-Hallett has over 13 years as a Crossfit & functional fitness training & coaching

Our MArtial Arts & Fitness Services

We started out as a Krav Maga gym in 2006 with the focus on giving the community a practical place to train in self defense. We are not another Martial Arts school or Sport/ MMA gym. We are about real-life training. There are no rules when someone attacks you or your family, Krav Maga is the answer to no rules fighting.

In 2008 we added Crossfit to the lineup. We saw Crossfit as a very complimentary strength & conditioning program to Krav Maga. Crossfit and Krav Maga share many similar philosophies: practical, anyone can do it (scaleable for all abilities, easy to get started, functional, no-nonsense approach), always pushing your limits. We knew it would benefit our existing members as well as bring it new members interested in functional fitness program.

ProjectFit Was added as RMSDF official fitness program in 2019. Over the last few years, we wanted to separate ourselves from other Crossfit gyms. We felt we had different goals than most Crossfit gyms and wanted the public to judge our program as it’s own brand of functional fitness.

The entire coaching staff at Rocky Mountain Self Defense & Fitness are focused on practical training. We do not believe that there are any quick fixes to get in shape. Nor do believe any of the programs we offer are “fad” workouts. We are about training for LIFE!

We are Not a Globo Gym. No Mirrors nothing fancy just real Training with real results.

We are not an MMA or Martial Arts school offering self-defense on the side. Sport and training for belts paid not earned is not what we are about.


Serving the Fitness and Krav Maga communities of  Castle Rock, Lone Tree, Parker, Larkspur, Meridian And Douglas County

Reach Us

Castle Rock

780 Kinner St,
Castle Rock, Co. 80109

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