Greg Mountain

Owner and Head Coach


I have had a passion for fitness my whole life. My athletic background began in sports such as water polo, football, and wrestling. After High School I was on a Hot Shot Fire Crew in Southern California and saw first hand the benefits of elite fitness. Once my fire crew career ended, I still had a passion for fitness that never left. Soon after I became a personal trainer for over 5 years in traditional gym setting. I did not start coaching CrossFit till late 2011. After programming and coaching for a local CrossFit for 3 years, I finally decided to own and operate my own CrossFit box.

I love CrossFit and the community within it. I invite you to become part of that worldwide community and call CrossTown CrossFit your local box. 


Bachelors in Exercise Science - American Military University  

CrossFit Level 2

CrossFit Level 1

ACE Personal Training Cert

Sports Nutrition Course

Periodization and Sports specific programming 

4x California Regional qualifier for male individual athlete - CrossFit Games. 



Kyan Katsimpas

CrossFit Group Class Instructor

I grew up in a family that encouraged competition and sport. From a young age, my two brothers and I were taught to make physical activity a top priority. Through my early youth and into my late teens I played competitive ice hockey which took me and my brothers around the country. As I matured, my interests broadened and I began participating in Brazilian Jiu Jitsu and earned my blue belt, rock climbing, road biking, and weightlifting. My love for athletics and fitness evolved and I began personal training at 24 Hour Fitness.
I discovered CrossFit in 2013 and after my first workout I was completely hooked. I fell in love with the way the workouts made me feel. The more involved I became, the more I realized that CrossFit is much more than a fitness program. Its a community that will give you the power to accomplish anything. CrossFit has changed my life and I'm excited to help people use CrossFit to achieve their goals.

NSCA-Certified Personal Trainer

CrossFit Level 1 Trainer

California Paramedic License 

Jackie Mountain

CrossFit Group Instructor / Adaptive athlete coach

I have always enjoyed being healthy and active. Growing up I wasn't the most athletic person but always wanted to be. I played softball for a few years in high school, but when I was in college, I decided to take my health into my own hands and just started working out at the college gym. Over the years, I ran a few half marathons and id typical gym workout, but it wasn't until I did CrossFit that I felt I was doing something that would change me not just physically, but mentally. I found CrossFit when I was 29 and was immediately hooked. For the first time, I felt like an athlete. I felt that I could challenge myself and always see progress. I continued CrossFit through my pregnancy and post partum and it has made me a better mom, wife and overall stronger person mentally and physically. In addition to coaching, I am a full time special education teacher. I have enjoyed implementing CrossFit into my students sensory and fitness routines. Seeing them make progress and gain confidence is an amazing experience. CrossFit has brought out my inner athlete and I like that I am able to show you how CrossFit can do the same for you. 

Chad Kackert 

CrossFit Group Instructor

Chad Kackert Bio 

What I find most powerful about training, CrossFit specifically, is its direct correlation with shaping character. 

When WoDs are difficult, you can feel and visibly see them make you stronger. You also observe that results come from hard work. There aren't any spoiled kids in the box. Everything is earned and you own it. No one else is going to hand you your health, but a good community and knowledgable coaching can have your back and join you in the process. 

My background is in football specific training. In college I learned how the technique of movements can rapidly increase results and keep athletes safe. Since then, I’ve closely observed and questioned some of the best strength coaches in the world of elite sports from Ryan Capretta (Pro-Active Sports Performance), Mike Boyle (MBSC), Luke Richesson (Head Strength Coach of the 2016 Super Bowl Champion Denver Broncos), and many others. 

After playing running back for the Toronto Argonauts in the CFL for several seasons and being forced into retirement by injury, I was hired as the head strength for the team. The following season I returned to playing and again experienced the results of knowledgable training and its positive effect on severe injuries. 

Whatever your hurdle may be, we can find a way over, around, under, and beyond. That’s what I’ve learned from my coaches and I plan to share those lessons with our athletes.


Certified Strength and Conditioning Coordinator 

CrossFit Level-1





The Owners , Greg and Jackie Mountain

Map - Location

Email Us
5260 Bonsai St. F
Moorpark, CA 93021
(805) 910-5025