Based in Davis, Ca, at Winterhaven Sporthorse Centre, Winterhaven Dressage and Horsemanship is owned and operated by FEI trainer/competitor and 2010 World Equestrian Game US Team Member Susan Treabess. At Winterhaven we pay attention to the details focusing on riders goals while maintaining healthy, happy horses. Although our passion is dressage, we are non-denominational and help a wide variety of riders and horses. We specialize in the development of young horses and offer a program that can take them from weanling to working-class citizen while maintaining classical horsemanship principals. We can care for the most serious competitor or simply help riders improve their relationship and riding experience with their equine partners. We limit the number of horses we accept in training so that we can concentrate on individual programs that meet the individual needs of each horse.  And we like to have FUN with our horses and riders!


Susan has over 20 years of experience in competitive dressage and horsemanship and holds her USDF Bronze and Silver medals. At age 12, through a project horse named Choco, Susan was introduced to the horsemanship principles taught by Tom Dorrance, Ellen Eckstein and David Hillman. She prides herself on combining the principles of classical dressage with horsemanship in her training business, clinics and lessons and hosts clinics with both Ellen and David at Somerset Farm.  For international and national competition, Susan is coached by and trains with Dennis Callin. Having extensive experience coaching and competing at the international level, and living in Europe for the past 10 years, Dennis also helps direct the Team Winterhaven show program including FEI small and large tour horses, FEI young horses, FEI Para Dressage, and our active Adult Amateur program.  This approach has enabled Susan to be active in the show ring while keeping the mental and physical health of the horse priority.

Susan has a long list of accomplishments, which includes her participation in the 2010 Altech World Equestrian Games as a US Team Member for the Para Dressage competition. Susan & Moneypenny placed 10th overall in the WEG and were ranked 5th in the world within their division. In 2012 she qualified for the London Paralympics on Terry Waechter’s PRE stallion Fugitivo XII, but withdrew from selection trials due to the arrival of her first child. Susan is currently competing the young stallion Kamiakin, schooling Prix St. Georges and campaigning for a United Stated Team slot for the World Equestrian Games Team for Normandy in 2014.

Susan has a very active lesson calendar and gives lessons to a wide variety of pairs, from currently competing FEI riders to pleasure riders who would like a foundation in classical dressage and horsemanship.

EVA KING – Assistant

Eva has been riding horses all of her life. She grew up as the typical horse crazy girl, riding in pony club, showing and parades. She began riding dressage in college and has been a student of Susan & Ellen Eckstein for the past 10 years. Under the guidance of Dennis Callin, Eva has become very active in the FEI Young Horse program and that’s where her passion lies. Eva has competed through 4th level, has her USDF Bronze Medal and is well on her way to earning her Silver Medal.

Eva directs the young horse program at Winterhaven and acts as the primary selector and rider of the young horses. In 2013, she rode her own young horse, Drake, in the Cal Bred Futurity and took home reserve champion. Eva and Drake are expected to compete in the US FEI 5yo division in 2014. Eva will also be campaigning Winterhaven client Annette Pressas’ 4yo, Fez in 2014.

In addition to assisting with the horses at Winterhaven, Eva & her husband Alejandro own King Farm, a boutique horse facility in Davis, CA.