About Rocky Mountain Self Defense & Fitness

At Rocky Mountain Self Defense & Fitness (RMSDF), we train for real life. We’re not a trophy-chasing dojo or a big-box gym. We’re a community-driven training center focused on practical self-defense, strength, and confidence for real people. We have tons of post you can read more about RMSDF on our blog

Who We Are

Founded in 2005 in Castle Rock, RMSDF started as a Krav Maga school with one goal: give people no-nonsense self-defense skills that actually work under stress.

Led by Head Coach John Hallett (4th-degree black belt) and Coach Jenny Jaeger-Hallett (functional fitness coach, 15+ years), our mission is to help you become stronger, safer, and more confident—at any age or fitness level.

What We Offer

Self-Defense Training

💪 Krav Maga – Real-world self-defense for chaos, not competition. No points. No fancy forms. Just simple, effective responses to violence.

🔫 Citizen Defender (IDS) – Integrated firearms + defensive skills for responsible protectors. Focused on safety, decision-making, and real-world context.

Fitness Programs

🏋️ ProjectFit – Strength & Conditioning – Our own brand of functional fitness built around longevity, strength, and performance.

🔥 Krav Maga Conditioning – Fight-inspired conditioning that builds endurance, power, and resilience.

At RMSDF, belts are earned, not bought. Skill comes first—always.

Why Train With Us?

✅ Real-world skills that work under stress.

✅ Beginner-friendly classes you can jump into at any level.

✅ A supportive community that pushes you to grow.

✅ No ego, no BS—just honest training and real results.

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

Not sure where to start? We’ll help you figure out the right path and see if we’re a good fit.