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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.

Natasha Traurig

Natasha Traurig

Guenter Seidel is world famous for his classic and his, in German terms, clean riding style, which is unmistakable and bears a tremendous asset in bringing out the best in his mounts. Guenter is renowned as a dressage rider who has successfully taken different horses to numerous international competitions including the last three Olympics, being a part of the United States victory of a team Bronze medal each time. A current resident of Cardiff, California, he has made his mark in the dressage world since the time he immigrated to the United States in 1985, from Germany.

In 2006, as a member of the U.S. Olympic Team, he helped win a Bronze medal for the United States at the World Equestrian Games in Aachen Germany and was the highest scoring American rider on the first day of competition.

In 2004 he had a sixth place finish at The World Cup for the U.S. and helped the U. S. team win a Bronze medal at the 2004 Olympic Games in Athens, Greece.

In 2003, he won the U.S. Grand Prix Freestyle Championship/U.S. League Final and won fourth place at World Cup and a Silver Medal in the Nation's Cup at CDIO Aachen, Germany Riding Aragon.

In 2002 he had a sixth place finish in the World Cup and won the Team Silver medal at FEI World Equestrian Games in Spain. He was also awarded the Whitney Stone Cup by the United States Equestrian Team (USET) in the same year and was awarded the prestigious honor as the individual who had achieved a most distinguished record in international competition while also serving as an ambassador for the USET and equestrian sports.

In 2001, he won the Grand Prix and the Grand Prix Freestyle as well as the Best Horse and Rider award at CDI Fritzens (Austria). In the year 2000, he qualified for the Sydney Olympic Games by placing second on in the State Line Tack/USET Dressage Championship and continued to the Olympics in Sydney, Australia, to help the U.S. win its third consecutive Olympic team Bronze Medal Riding Nikolaus 7.

Guenter's international victories started early; in 1999 at the World Cup, he placed ninth place riding Foltaire. In 1998 at the World Equestrian Games, Guenter was a member of the fourth place USET squad and he finished ninth individually in the World Dressage Championships.

Guenter plans to aim for another shot at the Olympics with James and Charlotte Mashburn's 11-year-old KWPN gelding (Royal Hit--Naica, Contango)Zero Gravity. Seidel debuted him at Grand Prix in August of last year at the CDS San Diego Summer Show (Calif.) with scores of 72.00 and 72.30 percent.

The pair won the Grand Prix Special at the L.A. Winter Dressage national show in Burbank, Calif., on Jan. 24-25 with a 71.56 percent before contesting the west coast’s first Reem Acra FEI World Cup Dressage Final qualifying competition at the 2015 Mid-Winter Dressage CDI (Calif.). They finished third in the competitive class with a 69.66 percent.