The Grindhouse

"I earned my black belt under Will Grundhauser and am so proud to be a part of the this gym for over the past decade. We have an eclectic group of people with varying skill and athletic levels. Whether you want one on one privates, or group lessons there is something for everyone here. Come down and test yourself and what you are capable of."

"Will Grundhauser has built an amazing environment for people of all experience levels to grow their skills. Their kids program is excellent as well. They learn respect, how to calm themselves, and of course martial arts. My personal experience has been that the growth from being there is much more than just physical and it filters into every other area of life."

"Have a mind with the willingness to learn? Welcome to the most accepting non judgmental gym I’ve ever been a part of. The Professor, owner, Will Grundhauser is a well decorated Brazilian Jiu Jitsu Black Belt who is more than eager to show you the skills he’s acquired over the years. You add that to the badass band of Warriors he’s helped shape and you have one of the best gyms in Billings in my opinion. Check em out! Behind Perkins. You’ll see the sign!"

"No other Jiu Jitsu or MMA gym in Montana has the same depth of knowledge and experience that Will and his team have. Myself and my two sons came in 6 years ago looking for some self defense training and found exactly what we were looking for and more. Such a great group of humans that train here, welcoming, knowledgeable, understanding and willing to share."