The center is an official CrossFit® affiliate. Last checked: 12/08/2025

CrossFit is a registered trademark owned by CrossFit, LLC, which is not affiliated with FitFit United States.

Information about CrossFit® Thin Air

Co Rd 820 60
80478, Boulder
+1 970-575-1027

Services, Machines and Guided Classes

CrossFit®

CrossFit® Thin Air: Opinions

5/5 (9 Opinions)
Mary Price 11 months ago

Fantastic experience: I’ve been coming to Thin Air Fitness on and off for years, and it continues to impress me every time. Leah and the entire team foster a no-nonsense, supportive environment that really makes you feel part of a team. Everything here is well-organized, and the equipment is always clean and sturdy. There’s a great emphasis on teamwork and personal growth, and I always leave feeling motivated and stronger. If you’re looking for a place where you’re genuinely supported and challenged, Thin Air Fitness is it!

Chris McCallum 1 year ago

Fantastic experience: CrossFit at 9,000+ feet and fantastic specific conditioning gym. Leigha and Truman are fantastic coaches and I would recommend dropping in when up in Grand County.

Aurélie Vilmer 2 years ago

Fantastic experience: Great classes, nice atmosphere, nice people and the most amazing doggy ever : shout out to Trueman!❤️

Chelsea Martinez 3 years ago

Fantastic experience: Positive: Communication , Professionalism , Quality

Vincent Giovannoni 5 years ago

Fantastic experience: If you're from somewhere that's lower elevation be ready to push yourself. Great workout as a drop-in and what a great group of people .

Tom Wollner 6 years ago

Fantastic experience: Super friendly. Great programming. Little hard to find. Had a blast, can't wait to get back

Adam Baukol 7 years ago

Fantastic experience: Did an early morning drop in class and had a great experience, thank you

Julie White 7 years ago

Fantastic experience: Love this place and these people! Great programing and coaching. Lots of fun! Definitely gets me ready for everything I like to do in Winter Park - skiing, snowboarding, biking, hiking, backpacking, rafting, softball.....

Benny Roitman 8 years ago

Fantastic experience: We dropped into Crossfit Thin Air during a recent trip to Winter Park and were warmly welcomed by their community of crossfitters. This box has an infectious energy and the owners have done an incredible job of cultivating a warm and inclusive community.

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