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Colorado Athletic Club Flatirons Owner verified
505 Thunderbird Drive Boulder, CO, 80303Last time updated: 4/22/26, 3:53 PM
About
Our members and guests love our social activities that range from happy hours and group hikes to pool parties and training for the BOLDERBoulder. Feel the difference when you walk through the doors of Colorado Athletic Club-Flatirons as our friendly, dedicated staff greets you before you head off to our full-amenity locker rooms. Get energized in one of the many studios or fitness classes, where youʼll be challenged and motivated by the best instructors in Boulder.
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Frequently Asked Questions
Which days is Colorado Athletic Club Flatirons open?
Open on Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday.
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