Onyx Club


300 Summit Blvd
Broomfield, CO 80021



Club Visits
this month
Guest Passes

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Get your Foundering Member Gear

Stop by the preview center this week and pick up your Founding Member gear and get any questions you might have answered by our team.


Download the App

The Life Time App is packed with features members want most. Check in, view class schedules, manage your account and LT BUCK$, reserve a court and more.


Attend the Grand Opening Celebration

Stay tuned for communications about upcoming events and our grand opening celebration.

Featured Black Friday Deal
Save 15% on Lab Testing

Enjoy Black Friday savings on our best-selling Stress and Resilience Lab Test. Gain a deeper understanding of what’s going on with your metabolism and how it could be preventing you from reaching your goals.

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Love Your New Life Time

Renovations are currently underway with an anticipated Grand Reopening event later this year. Flatirons will be an upscale country club and resort, with over 80,000 square feet of best-in-class amenities and programs.

Enjoy access to our other Colorado clubs during renovations: Westminster, Parker-Aurora, and Centennial.

Spaces Beyond Compare

Step into beautiful, functional spaces that inspire and invigorate, with a resort’s worth of amenities. You’ll have access to brand-new cardio and strength equipment from the industry’s most innovative brands.

Images are representative of actual spaces.

Fresh Looks & New Features

You’ll find updated places to warm up, work out and unwind.

Fitness Floor

Yoga Studio

Cycle Studio

Locker Rooms

Functional Training

Child Center

Cardio Floor


Seating at the LifeCafe


If it’s here, it’s healthy. Enjoy chef-crafted meals and healthy takeout options, smoothies and yummy favorites for the kids.

Entrance into the Salon and Spa


Love your body. Relax from head to toe or focus on recovery between workouts and receive 40% off your first-time hair, skin, nail and massage services.

Your Passions, Our Programs

Do what you love

90+ Weekly Classes

8 Signature Classes

Clubs Nearby

As a Flatirons member, you’ll also enjoy access to these area clubs:

The outside of Life Time Fitness, the best health club in Westminster, CO
Life Time Fitness Parker-Aurora, the premier health club in Parker, CO
The Life Time Athletic and Tennis complex, the premier tennis facility in Centennial, CO