Welcome to The Arena

Thanks for your interest in The Arena, San Diego’s top ranked gym for Combat Sports training. Over 1000 members strong, we’re known worldwide for our high level instruction. We’re also the largest Mixed Martial Arts school in North America, with 170 weekly classes in:

Each of our Combat Sports programs are among the biggest in the U.S. Combined with our outstanding coaches and world class facility, our gym offers the best training environment in San Diego.


JUST SAY NO TO “CARDIO MARTIAL ARTS”. Instead, develop real skills. You don’t have to fight to train with us, but you will train the right way when you’re here.

No experience? In our classes, you’ll build a strong foundation from the start. Want to compete? We have everything you need to succeed. Already a fighter? We run some of the top fight camps in California / United States.

So if you’re looking for the best gym in San Diego, CA, USA for training in Boxing, Judo, Jiu Jitsu, Muay Thai, MMA and Wrestling, you found it.


Because we believe so strongly in what we do, we offer a FREE TRIAL so people can discover what we’re all about. Just sign up for your trial on this page and then come in, even if you’re only visiting San Diego. Everyone’s welcome.