Authentic Health and Fitness for Everyone. 

5280 CrossFit is the ultimate mash-up of amazing people, proven fitness techniques, and a crazy supportive community.
If you feel like you’ve tried everything and still have not found the right fit for your fitness and health, look no further. Welcome to the Best CrossFit Gym in the Mile High city.

Become a greater version of yourself at 5280 CrossFit.

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About Jason Grubb
Founder & Owner, 5280 CrossFit

I started CrossFit just over 3 years ago… After years and years of running and biking, I wasn’t satisfied with the way I felt or looked. Yep, I was quite a bit thicker and significantly lacked mobility in my shoulders and hips.

As a wedding photographer, a 10 hour day of shooting would crush me… So would 20 push ups.

After one CrossFit workout, I was hooked. I felt like I accomplished so much in one hour!

As a 41 year old with 4 kids (two under the age of 4), I’m in the best shape of my life. I love working hard, experiencing dramatic results, feeling strong, and knowing I’m healthy.


I founded 5280 CrossFit to help others achieve their health and fitness dreams.

Whether your goal is to lose weight, create a hedge against chronic disease, recover from a previous injury, become more mobile, actively participate in sports, play with your kids, or mix things up as a seasoned athlete; 5280 CrossFit can to help you achieve your unique goals.

We work with all kinds of people looking to get “healthy and fit” (including many who’ve never belonged to a gym). We’re all about getting you results AND we’re committed to being a fitness home that you actually love.

Learn More about 5280 CrossFit