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This unique 5K is unlike anything in the area! The Crucible will be hosted on 20 beautiful acres of woods and trails just outside Sister Lakes, Michigan. We will run, walk, and maybe even lunge through wooded  hills, open fields, and even a creek!  Along the way, there will be challenge check points where we will rock out some functional movements (think air squats, push-ups, sit-ups, burpees, etc) before we head back out on the run. The Crucible will test your stamina, strength and speed, which means the fastest runner will not necessarily win!   Bring your kids! after the race there will be a FREE kids course for the little ones to run. After the race hangout with us as we refuel our bodies with some delicious hot dogs! If you’ve got the competitive spirit, push the pace and try to win the Crucible!  Or, just come out and have fun with fitness while you complete the course. 

This is Rachel. She is one of our athletes who is an amazing example of #momgoals and #fitnessgoals at our gym. When she first started coming to the gym she was postpartum from delivering twins via c-section. She had the goal of being in the best shape of her life when she started coming to Cultivus. She worked with our coaches to scale appropriately and through consistency and passion for CrossFit and running she reached her goals and continues to be in the best shape of her life! She achieved strict pullups and double unders and continues to cross goals off her list!

Now her twins just turned 3, and she goes around attending and sometimes winning various fitness competitions. She got 1st place for females at the Brutus functional 5k and recently won 1st place in her age group at a half marathon she ran. We are so proud of her and she is known for her quick wit and smile at the gym. She is an inspiration for moms, post surgery athletes, and anyone reaching toward a goal.

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This is Bill. He began his journey with Cultivus by joining our 8 Week Transformation Challenge! After losing 25 lbs and 7% body fat he is addicted!

 Check out what he has to say,

"If you’re looking to drop some weight, get in shape and have a great time doing it, you need to check out this gym. I joined the 8 Week Transformation that they offered and couldn’t be happier with the results! The eating plan given to me was the EASIEST plan I’ve ever followed! So simple yet so effective. And the workouts, while challenging, are so fun and rewarding when you get through them. In 8 weeks I lost 7% body fat, increased my muscle mass and dropped down to a weight I haven’t been at in 20+ years. I am now TOTALLY addicted to Cross-Fit and can’t wait to see my results after a year! I also have to say that my coaches Seth, Cadence and Hanna are the best! They make you feel at home here and are committed to your health and fitness!" 

Way to kill it, Bill!! 

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Check out what people are saying about us on Google!

"Great place. Very friendly and knowledgeable coaches. You will see results! Multiple options for membership and only CrossFit style gym to offer childcare. Also scale down workouts per individual needs and restrictions."
"I love our gym. Cultivus has done an excellent job of meeting people where they are at, and have built a community that is so incredibly supportive. And, unless they are positive that everyone in the workout knows the moves, everyone is taught the move, so no one has to find the courage to ask."

"Friendly and helpful coaches! They’re super patient whether it’s your 1st or 100th time doing crossfit."


"I was really nervous about trying it but I have really enjoyed it. Everything is at your level, the coaches are really nice, and the Transformation group I am in is really fun and friendly. I am so glad I tried it out. It works!"


"I have never enjoyed going to the gym until now! Such a great gym with knowledgeable coaches who are committed to helping you grow no matter what your level of fitness and a welcoming community to work out with. Highly recommended."

I joined Cultivus Fitness 6 months after having my third child. It had been a difficult high-risk pregnancy due to Type 1 Diabetes and related health issues. Prior to delivery, I spent a month on bed rest. After all that, I was terrified to join a gym. An athlete in my younger years, I was sure I'd feel out of place and discouraged. But the opposite was true. This community embraced me just as I was and made me feel at ease. Also, they have a great childcare set up that allows me to leave the Mommy guilt at the door. My kids love coming and say they want to be "strong like Mommy." I couldn't ask for more!

Try before you buy

1 week free!

Unlimited monthly classes


Kids fitness class

10 class punch card
5 class punch card 

Fit for life (50+)

monthly membership

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