CrossFit in Boulder
Get stronger, leaner, and fitter with coached CrossFit classes tailored to your level.
Our CrossFit classes combine strength, conditioning, and skill work to build lasting fitness. You’ll train with barbells, dumbbells, kettlebells, bodyweight movements, rowers, bikes, SkiErgs, and more.
Best CrossFit in Boulder since 2016
CrossFit Classes in Boulder
CrossFit combines total-body strength, conditioning, and skill work in a coached group setting.
Every day is different, but the goal is simple: help you get stronger, improve your conditioning, and build fitness that lasts.
Every class is coached and tailored to your current fitness level.
What to expect
Depending on the day, you may train:
New to CrossFit? No problem. Your coach will help you choose the right movements, weights, and intensity for your level.
View the class schedule →
Why CrossFit at CrossFit Sanitas?
CrossFit Sanitas combines expert coaching, smart programming, class variety, and everything you need to stay healthy and keep progressing.
50+ weekly classes
Expert coaching in every class
Workouts tailored to your level
Large central Boulder facility
CrossFit, Functional Strength, HYROX, Endurance, Olympic Lifting, Women’s Strength, and Open Gym
Onsite physical therapy, massage, sauna, and cold plunge
4.9 Google rating
Voted Best CrossFit in Boulder every year since 2016
Whether you’re brand new to CrossFit or have been training for years, our coaches help you find the right level of challenge and keep making progress.
Start with a free intro
Not sure where to begin? Start with a free 15-minute intro.
No workout. No pressure. Just:
Tour the gym
Talk through your goals, race plans, injuries, and schedule
Learn how our CrossFit classes work
Get your best starting option
Book a free class
Trusted by Boulder athletes, beginners, and busy adults
At 52, I've never felt stronger or more motivated to continuously increase my strength and fitness. What keeps me coming back to CrossFit Sanitas are the knowledgeable and skillful coaches, a supportive community and a holistic approach to health and wellness.
— Nikki R.
CrossFit Boulder FAQ
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No. You come to CrossFit to get fit. Our coaches adjust movements, weights, and intensity to your current fitness level.
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Yes. Every class is coached, and beginners train alongside experienced members using appropriate versions of the same workout.
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Classes typically include a warm-up, strength or skill work, and a conditioning workout. Your coach explains the workout, teaches the movements, and helps you choose the right options for you.
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Many members start with two or three classes per week and build from there. Your ideal schedule depends on your goals, experience, and the other activities you do.
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Yes. Coaches regularly adjust movements and workouts around injuries, mobility limitations, and different fitness levels. If you have a significant injury, we can also connect you with our onsite physical therapist.
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In addition to CrossFit, Sanitas offers Functional Strength, HYROX + Endurance, Women’s Strength, Olympic Lifting, and Open Gym.n
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We’re in central Boulder at 2525 Arapahoe Ave, near Sprouts and McGuckin.
Ready to Get Stronger, Leaner & Fitter?
CrossFit classes.
Expert coaching.
Workouts tailored to you.
