At Derby Farms the Emphasis is on Dressage

Pamela T. Pentz • Owner/Trainer/Manager:

Since 1980 Pam Pentz has owned and operated Derby Farms, a full service training and breeding facility with an emphasis on dressage. Pam has ridden most of her life and began her professional career when she graduated from the Potomac Horse Center’s Horsemasters course in 1975 with honors in instruction. She began her teaching and show career at the Evergreen Equestrian Center in Kirkland, Washington in 1976. Klaus Albin provided her with her earliest guidance in dressage.  She has continued her dressage training over the years training with Steffen Peters, Inez Propfe-Credo, Jan Ebeling, Hilda Gurney and Gwen Blake.

In 1982 Pam was licensed by the United States Equestrian Federation as a dressage judge.  She is currently a “R” dressage judge with the USEF and a retired FEI “C” Para-Equestrian Judge. Pam is also a USDF Bronze and Silver medalist with the United States Dressage Federation. As an active breeder of Oldenburg horses she is a member of the Verband der Züchter des Oldenburger Pferdes better known as the German Oldenburg Verband (GOV) and owns the Grand Prix Oldenburg stallion Rodioso whom she competes at Grand Prix and stands at her farm.

Ms. Pentz lives at Derby Farms in Woodinville, Washington with her husband Peter and together they run the farm and an antique business that specializes in early American furniture. Her husband Peter is an accomplished woodworker and not only specializes in American antiques but also in their restoration and repair. They like to joke that his hobby is horses and her hobby is antiques.

Pam has a busy teaching schedule, specializing in the amateur rider and many of her students have received USDF recognition by receiving Bronze and Silver medals and a junior rider Margaret Odom placed 9th in the nation in 2008 and was a member of the USDF Region 6 Junior Team! Pam’ greatest passion is starting young horses and being a breeder she is hands on from birth. She has a staff of excellent young adult riders who help with the riding and training duties and all work as a team for Derby Farms. Read on to meet some of the team.

Katja Waldron | Riding Assistant

Katja came to Derby Farms in the fall of 2013 to audit a Jan Ebeling Clinic and signed up with Pam for some dressage lessons. Katja received the beginning of her dressage training riding with Christiane Noelting of California throughout her early teens and then helped ride client's dressage horses in the Davis area while she was in high school. Based on her excellent riding skills I hired her almost immediately as a working student. After doing everything from backing 2 ½ year olds to refining her skills at Piaffe/Passage and one time changes with lessons on Rodioso she is now my part-time riding assistant/trainer. Katja has had a riding passion since birth that she got from her mother a native born German who is a professor at UC Davis in California. Her mother has purchased two outstanding Rodioso youngsters over the years and done very well, winning national awards on the eldest, (Betsy) Ross with Reveille waiting in the wings due to his youth. Betsy and Reveille are now stabled at and train with Susan Treabess of Woodland, CA. When Katja flies back home to Davis to visit her family she gets the chance to ride her mother's horses with Susan. In the Spring/Summer of 2015 Katja was able to take advantage of the wonderful opportunity to ride and train with talented German dressage trainer, Jochen Vetters, while she studied abroad in Berlin. Katja graduated with a BS in Psychology from the University of Washington in 2016 and devoted most of her summer showing young horses for Derby Farms and clients, most notably Rodio (Rodioso/Art Deco) for Bonnie Kearney of North Bend Washington earning a national breed award at Second Level. She splits her work time between the University of Washington Psych Lab and Derby Farms.

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Farrier Services & Veterinarian Care

Codi Tripp

Codi came to us upon our veterinarian’s recommendation and is an outstanding farrier in the sporthorse field.  He has had extensive experience in the Arabian show world in the Southwest, Hunter/Jumpers in the East and dressage horses her in the Pacific Northwest.  He is always prompt about appointments and sensitive to the sport horses needs.  He is extremely well versed with the young horse and foals and keeps everyone here at the farm on a regular schedule. You are welcome to use the farrier of your choice, but if you need one Codi will be happy to accommodate you.


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Rainland Farm Equine:
Rainland Farm Equine Clinic is the 24 hour vet service on call for Derby Farms. The clinic is less than a mile from the farm and houses a full surgical unit as well as having two full time vets on call at all times. Dr. Robert Fleck is the clinics founder and head vet and tends to all the reproductive care as part of the Derby Farms Breeding program. A client is welcome to use any vet of their choice, but it is nice to know we have such a fine and experienced clinic at our finger tips 24/7. For more information on Rainland . For more information on Rainland Farm check out their website at

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Photo credits: Pentzphoto, Scarlett, CBP