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Boulder, Colorado


Schooling and Show Apparel for Jumpers and Dressage Riders, Meticulously Tailored Equestrian Styles using Cutting-Edge Technologies Posh Performance!

Where we live?

Boulder, Colorado USA - Land of Great Skiing, Riding and Cycling. Our Ponies love the Mountain air and 300 plus days of sunshine!

Blending Posh with Performance, Mastermind Equestrian Apparel offers a generous helping of European tradition with Cutting Edge innovation and American Ingenuity. Imported and featuring Swiss Schoeller (R) Fabric Technologies, German Gutos Snaps and Fittings, and Genuine Leather with LYCRA (R) full seats to keep your Ride Elegant, Energized, Clean and Secure.


Meet Mastermind Intern Lexi Karet

Elizabeth Anne

We are thrilled to welcome our new social media maven, Lexi Karet, to Mastermind.  Lexi's exuberance and enthusiasm are a reminder of the promising future generations of upcoming equestrian athletes. 

Lexi is currently pursuing her undergraduate degree in English Literature with a minor in Apparel and Merchandising at Colorado State University. As a member of CHJA and USEF, Lexi has competed as a hunter/jumper since she was 12 years old. She has two horses: Peter, and her young prospect, Prada. This summer Lexi took a hiatus from showing in order to focus on training Prada in preparation to compete in the upcoming hunter ring next summer. In addition to riding, Lexi enjoys yoga, running, and spending time with her two fluffy dogs: Benson and Bauer.  





Calleen Kinney Inspires: Marine, New Mom and Dressage Competitor

Elizabeth Anne


 Calleen Kinney is an adult amateur competitor who comes from a long lineage of professional and amateur equestrians. Calleen’s parents both served in the Marines and, at an early age, fostered her appreciation for and interest in riding and competing. At only nine years old, she was introduced to her first horse; which spurred her lifelong passion for equestrianism. Calleen attended the University of Florida and earned her B.S. in Animal Science– specializing in Equine Science. Upon graduation, she continued her family’s military tradition and became a pilot in the Marine Corps (she has since earned the rank of Major). In addition to pursuing her riding and military career, Calleen is a proud wife and recent mother of an 11 month-old baby girl. Calleen and her family are currently stationed in Virginia; where she divides her time between her family, military career, and her 7 year-old Westphalian gelding, Sokrates (a.k.a. “Duke”). She has acquired her Bronze medal and currently rides and trains with her Aunt, Jackie Kinney, who runs and owns Horses in Harmony Dressage Farm in Maryland. Her next goal is to achieve her Silver medal by the time she retires from the Marine Corps.