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The Grindhouse
4.9 ★★★★★ 39 Google reviews · Muay thai gym in Billings, Montana
Plan your first class
- Free trial or intro class most gyms welcome new members with a free trial or intro class — check their site or give them a call to book your first session
- Beginner-friendly all levels welcome, including total beginners — you don't need to be fit or have any experience to start
- Kids & youth classes kids and youth muay thai classes (ages 4–14) — built around discipline, focus, and confidence
- Women's classes dedicated women's muay thai classes — a welcoming space to train and start out in
- Private lessons private, one-on-one coaching available — a focused way to start or to work around a busy schedule; ask about availability and rates
- Fight team a competition team for members who want to test themselves as amateur fighters
- Today see hours ·
- Website & schedule mmabillings.com — book classes and see the live schedule
- Phone (406) 598-4060
Hours
| Monday | 12–2 PM, 4–8 PM |
| Tuesday | 12–2 PM, 4–8 PM |
| Wednesday | 12–2 PM, 4–8 PM |
| Thursday | 12–2 PM, 5–7 PM |
| Friday | 12–2 PM |
| Saturday | 12–2 PM |
| Sunday | Closed |
The classes they run
“Jiu-Jitsu, Boxing, mma, Gi, NoGi, womens only classes, children’s classes!”
“Jiu-Jitsu, Boxing, mma, Gi, NoGi, womens only classes, children’s classes!”
“Whether you want one on one privates, or group lessons there is something for everyone here.”
“Whether you want to compete, learn to defend yourself, or just want to find a new hobby this is the place you want to go.”
“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.”
Other martial arts here
“Great kickboxing, boxing and MMA programs as well.”
“I also had recently done some boxing training and wanted somewhere to train in that aspect as well.”
“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.”
“No other Jiu Jitsu or MMA gym in Montana has the same depth of knowledge and experience that Will and his team have.”
What members say
“Will is a great coach and extremely knowledgeable.”
“Once the unknown is out of the window this group has been one of the most welcoming/nice environments that I have experienced.”
“Fantastic gym, Sincerely look up to professor Will, he is intelligent and passionate about his practice, and their family has fostered an amazing community there.”
“The instruction is top notch with new techniques brought from other gyms to enhance the scope of what could be learned.”
“Whether you want to compete, learn to defend yourself, or just want to find a new hobby this is the place you want to go.”
From the reviews
The only intimidating thing about walking into this MMA gym is the step before you touch the door. Once the unknown is out of the window this group has been one of the most welcoming/nice environments that I have experienced. It's an amazing place to figure out the type of person you are, and who you could become.
After moving to Billings for work I wanted to try out Jiu-Jitsu as I had wrestled my whole life. I also had recently done some boxing training and wanted somewhere to train in that aspect as well. The Grindhouse DOES IS ALL!!!! Jiu-Jitsu, Boxing, mma, Gi, NoGi, womens only classes, children’s classes!
I was in town for a few months and couldn’t ask for a better place to train. Will is a great coach and extremely knowledgeable. Everyone that trains here are very welcoming and friendly. Ive been to gyms around the country and this one has them all beat.
Didn’t know a single person at the gym when I first showed up, now I have a great team of friends and love the path this has put me on! Top notch gym with world class technique and fighters
New to muay thai? Start at The Grindhouse
The Grindhouse comes up as a beginner-friendly gym — noted on their own site. If you've never thrown a punch or a kick, that's exactly who a good beginners program is for. A few things worth knowing before your first week. First, you don't need to be fit to start — you get in shape by training, not before it, and coaches scale the conditioning to you. Second, you won't be thrown into sparring — reputable gyms build fundamentals (stance, footwork, and the basic strikes of the "art of eight limbs") for weeks before any contact, and sparring stays optional. Third, all levels really are welcome — ask about a dedicated beginners or fundamentals class time so your first session is alongside others who are also starting out. Most gyms are happy to let you watch or try a class first, so reach out before you commit.
Your first muay thai class at The Grindhouse
Nervous about walking into a muay thai gym for the first time? Almost everyone is, and good coaches expect beginners to come through the door. Here's what to know. What to expect: a typical first class is a warm-up, then drilling the basics on pads and bags — not fighting. Rest whenever you need to; no one will bat an eye. What to wear: shorts or athletic wear and a t-shirt; you'll train barefoot on the mats. What to bring: water and hand wraps if you have them — many gyms lend gloves for a first class, so it's worth asking when you call. As you keep training you'll add your own gloves, wraps, a mouthguard, and shin guards. Sparring is optional and comes later, once your fundamentals are solid. Arrive 10–15 minutes early to sign a waiver and meet the coach. It gets easier fast — most people feel far more at home by their third class.
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