Welcome to The Grindhouse

Where Champions Train Champions

About Us

Qualified Instructors

My name is Will Grundhauser Head Coach and 1st degree Blackbelt directly under 5X World Champion Bernardo Faria Team Alliance. 

Find out more

Modern Studio

We offer the largest Academy for over 500 miles around. Over 2000 sq/ft of mat space, Full size cage, and everything you need for all of your lifting and fitness goals.

Our Philosophy

We offer World Class Training to the Billings, Montana Area. We specialize in Functional Martial Arts and Fitness. Our teachings are tested and proven on the mats and in the cage, with our World Class Competitors! Train with the best around to achieve your goals, we specialize in helping people find their true potential!


We offer A.M. Bootcamp and Personal Training upon Request

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Be the first to hear about upcoming class registration, special events, and free trials.

Contact Us

We are located on the 17th street side of the Restore Habitat for Humanity building. Look for the Big G on the entrance door!

The Grindhouse

1617 1st Ave N, Billings, Montana 59101, United States




Monday 12-2pm and 4-8pm

Tuesday 12-2pm and 4-8pm

Wednesday 12-2pm and 4-8pm

Thursday 12-2pm and 5-8pm

Friday 12-2pm and 6-8pm

Saturday 12-2pm

Private Lessons by Appointment only call 406-200-0198 to schedule yours today!

Get in Touch!