
Join our community and get fit with our state-of-the-art equipment, expert trainers, and fun group classes. Start your journey to a healthier lifestyle today!
Powered in partnership with Lighthouse Academy and led by Coach Jessica Deffenbaugh.The HATC Combat Collective is Big Bear’s premiere home for Brazilian Jiu-Jitsu, grappling, striking, movement-based conditioning, women’s self-defense, and combat performance training.
Experience top-tier martial arts, strength training, and recovery in a holistic, outdoor-inspired environment designed for all levels.
Open to all! From kids to pros, enjoy no-pressure martial arts, outdoor training, and a supportive community in Big Bear's high-altitude setting.
Explore a variety of martial arts like Boxing, Muay Thai, and Jiu Jitsu in our high-altitude outdoor setting. Train safely, build confidence, and elevate your skills.

Technical grappling classes focused on self-defense, leverage, positional control, submissions, and live training for teens and adults.

We offer both movement-focused introductory classes (4-7yo) designed to help young children build coordination, confidence, listening skills, and discipline in a fun, supportive environment, and structured youth martial arts classes (8 to 12yo) focused on confidence, teamwork, anti-bullying principles, physical literacy, and foundational grappling skills.

Structured youth and adult boxing classes that coach from fundamentals to skills-based training, focused on confidence, teamwork, anti-bullying principles, physical literacy, and foundational skills as well as advanced competition readiness.

Empowering classes focused on striking fundamentals, awareness, practical self-defense, conditioning, and confidence-building.

Collaborative mat time for drilling, sparring, rolling, movement work, and community training in a relaxed environment open to multiple experience levels.

One-on-one sessions available in:

BJJ Brown Belt • Combat Sports Trainer • Program Development Lead
Jessica Deffenbaugh brings a rare combination of elite martial arts instruction, corrective movement expertise, rehabilitation knowledge, and deeply personal resilience to her role as Head of Martial Arts Programming at the High Alpine Training Club and The Sports Office. A Brazilian Jiu Jitsu Brown Belt under Jaime Fletcher of ASAP Jiu Jitsu (Rigan Machado / Erik Paulson lineage), Jessica has spent more than a decade helping athletes and everyday individuals transform their physical and mental performance through martial arts, strength training, mobility, and recovery-focused coaching.
Jessica began her fitness career in 2012 before launching her own training business in 2013, later earning certifications in corrective exercise, neurokinetic therapy (NKT), and fascial stretch therapy (FST). After discovering Brazilian Jiu Jitsu in 2016, she quickly became immersed in the sport, competing within weeks and eventually opening The Lighthouse Academy in Big Bear Lake, where she built a respected mountain martial arts community featuring seminars and guest instruction from some of the country’s top athletes and coaches.
Known for her holistic and highly personalized approach, Jessica combines biomechanics, mobility training, rehabilitation modalities, functional movement systems, and martial arts instruction into programming designed to help people of all ages and skill levels build confidence, discipline, resilience, and long-term wellness. Her work extends beyond the mats — mentoring students through personal growth, recovery, and life transformation.
At HATC, Jessica leads the expansion of martial arts, combat sports, mobility, youth programming, women’s self-defense, recovery integration, and performance-based training initiatives as part of The Sports Office’s growing altitude performance platform in Big Bear Lake.
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