TRAIN BLDR.
BUILT BLDR.
LIVE BLDR.
Coached classes, 24/7 access, and a community that shows up — on Pearl Street in Boulder, CO.
YOUR FIRST CLASS IS FREEWHAT MEMBERS ARE SAYING
Don't take our word for it.
"The instructors really know what they're doing and it shows in every class. They don't just tell you what to do — they explain why it matters and how to do it correctly. The 6am class is what truly makes this place special. Somehow they've made early mornings feel motivating instead of miserable."
Google Review"Wish I would have done it sooner. Some of the best programming I've ever had. Knowledgeable coaches — they will teach you how to do a movement if you're a rookie and will correct your form if you're a veteran. Great community. Super low staff turnover. Can't recommend this place enough."
Google Review"I've been on the search for a gym that had intentional programming designed and focused on longevity. That is BA + more. I've gotten stronger and felt supported to lift in ways I never ventured into before. One thing I love most is the utter lack of ego. Everyone is here to be a better version of themselves."
Google Review4.9 ★ on Google — 100+ reviews
EXPERIENCE THE BLDR DIFFERENCE
One system. Multiple paths. Every workout written with intention by Head Coach Park Roberts.
Coach-led sessions blending strength, conditioning, and mobility. Choose BLDRStrength or BLDRHybrid based on your goals. Every level welcome.
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One-on-one sessions tailored to your goals. Personalized programming, focused coaching, and accountability from our experienced team.
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Train BLDR from anywhere. The same proven programming our members follow — BLDRStrength, BLDRHybrid, and BLDRHome — delivered to your phone.
TRAIN ONLINE →WHY BOULDER ATHLETICS?
This isn't just a gym. It's a system, a community, and a path to lasting change.
Every workout follows a periodized structure. No random workouts. No guessing. A proven system designed to build real, measurable progress over time.
Our coaches don't just count reps. They teach movement, correct form, and scale to your level. Whether it's day one or year ten, you'll get better every session.
The people inside these walls make it special. Accountability, support, and the kind of energy that makes early mornings feel worth it. You'll feel it from your first class.
Classes Mon–Sat. 24/7 gym access for unlimited members. Online programming when you're traveling. Three programs to match any goal. No excuses, just options.
READY TO TRAIN BLDR?
Your first class is on us. Show up, see what we're about, and decide if it's for you. No pressure, no commitment.
SIGN UP FOR YOUR FREE CLASSLove it? Your next 2 weeks unlimited for just $50.