MAC
In Body570
January is the time to get your body composition done with our brand new state-of-the-art
InBody 570 analyzer, the same as used in hospitals and clinics across the country.
At Montana Athletic Club, we’re redefining fitness. From personalized programs to group classes and expert support, we balance challenges with care to ensure your success every step of the way.
Bigfork Gym Offers State-of-the-Art InBody Testing
The InBody 570 helps you:
COUPLE THE INBODY TEST WITH A SESSION WITH ONE OF OUR PROFESSIONAL PERSONAL TRAINERS AND YOU HAVE A RECIPE FOR SUCCESS!
The InBody test is non-invasive and simple – step on the device, grab the handles and in 45 seconds, you have results you can work with.
The MAC has several InBody options available, from a single test to multiple test packages – with or without Trainers. Please see the MAC Concierge for details.
START YOUR NEW YEAR ROUTINE RIGHT – AND SEE THE RESULTS THAT WILL KEEP YOU MOTIVATED!
About Us
Forge Your Fitness Gym and CrossFit Adventures
The Montana Athletic Club was built as a partnership between Doug Mahlum and Jack Tawney in 1991 at 17,000 SF and had 600 members. Today, the MAC is at 32,000 SF with 2,500 members. We are a full-service facility with world-class trainers and instructors.
We pride ourselves in exemplary service and strive to meet the need of each member and guest. Come be a part of our family and enjoy all we offer. What’s keeping you from getting fit?
Our Services
Services & Programs
Full-Service Fitness Facility
Access top-tier equipment, expert trainers, and diverse classes under one roof.
Personalized Training Programs
Work with world-class trainers to create custom plans tailored to your goals.
Community-Driven Wellness
Join a vibrant community with over 2,500 members and a legacy of growth since 1991.
Full-Service Fitness Facility
Access top-tier equipment, expert trainers, and diverse classes under one roof.
Personalized Training Programs
Work with world-class trainers to create custom plans tailored to your goals.
Community-Driven Wellness
Join a vibrant community with over 2,500 members and a legacy of growth since 1991.
New Online Gift Cards
Give the gift of health! Buy gift cards or anyone on your list!
Discounted Guest Pass
Trying It All For Yourself
InBody
Find Out What You’re Made Of
Try A New Class
See Our Class Schedule
MyZone
#EffortRewarded
The Montana Athletic Club was built as a partnership between Doug Mahlum and Jack Tawney in 1991 at 17,000 SF and had 600 members. Today, the MAC is at 32,000 SF with 3,000 members. We are a full-service facility with world-class trainers and instructors.
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Contact Info
© 2026 Montana Athletic Club | Bigfork MT | (406) 837-2582.