Onyx Club


300 Summit Blvd
Broomfield, CO 80021



Grand Opening January 31st

Life Time Athletic Flatirons, grand opening in late January, will be an upscale athletic resort with over 80,000 square feet of best-in-class amenities and programs.

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Where Health Meets Luxury

Life Time is excited to bring you a world-class health and fitness experience unlike any other. Get ready to join a strong community with the best places, programs, and performers.

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


Your Passions, Our Programs

Do what you love

90+ Weekly Classes

8 Signature Classes

Exclusive Benefits for Founding Members

Join by January 31 and receive pre-opening benefits including:

Discounted Joining Fees | Invitation to the January 31 Grand Opening Event  | Onboarding Personal Training Session | Branded Gear Bag | 100 LT BUCK$ to spend on any service | Kids Age 11 and Under will Receive a Kids Academy Shirt, Plus One Month Free of Group Swim Lessons




In The Club
Services & Programs


Health Assessments

Social Events

Nutritional Coaching

Weight Loss Programs

Child Center

Kids Academy

Kids Sports

Run Club

Cycle Club

Kids Camps

Personal Training

Group Fitness Classes


Indoor Cycle



Basketball Leagues


Outdoor Tennis Courts

Yoga Studio

Pilates Studio

Fitness Studio

Indoor Pool

Outdoor Pool

Lap Pool


Steam Room



Basketball Courts

Cardio & Weights Floor


Indoor Cycle Studio

Go after your goals

Life Time offers over 90 boutique programs per week that push you and align with your passions. Do what you love at a time that moves you most.

Sample Group Fitness Schedule

Sample Kids Academy Schedule

Healthy & Convenient

Fuel your body with nutritious meals and care for your hair, skin, nails and muscles without leaving the club. 

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

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.

Clubs Nearby

Explore other Life Time clubs in your area.

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