Free Intro Class!

Want to come and try us out? We offer a FREE trial session at 6:30 every Wednesday evening or Saturday morning at 10:00am!

If you would like to try CrossFit but are worried that it may be too intense or not right for you, please come in and give it a try! All of our workouts can be modified for ANY individual!

$50 for the First Month

Do something different and get in shape this holiday season! Come try CrossFit for only $50 for your first month! This includes our comprehensive Skills Program as well as two weeks of regular CrossFit!

Extraordinary coaching & Supportive community

Come reach your fitness goals with a fun, safe, and supportive community.

We at Flatirons CrossFit believe that even though you may not be a professional athlete, you deserve to be treated like one! Our members get to learn from our highly qualified coaching staff, have access to our specialty programs at no additional charge, and succeed with the support of our truly amazing community. Come learn, grow, and become a healthier, fitter, and happier version of yourself.

Why Flatirons CrossFit

You success in safely reaching your goals is our top priority. Our high standard of excellence has been producing champions in sports such as Rowing, Weightlifing, and CrossFit since 2007. Our facility has Boulder’s only full time Olympic Weightlifting room separate from the CrossFit training space and free to our members.

We are dedicated to building healthier, happier, fitter people.

Getting Started

New to CrossFit

Looking for a new Box? We believe that finding the right gym is important so we offer a free week of unlimited access to anyone with CrossFit experience so we can get to know each other.

Experienced CrossFitter

If you just moved to the area or simply are looking for a new box we invite you to come in and train with us for a free week so we can get to know each other.

Drop In

Currently train at an Affiliate and are visiting town? We would love to have you stop on by for a workout!

Wellness Program

Want to try CrossFit but think that you are not quite ready for the regular classes yet? Try our wellness program! It is a month long boot camp course that will ease you back into training as well as teach you about nutrition, movement, and mobility!