Our Team

Pamela T. Pentz - Owner/Trainer/Manager:

Since 1980 Pam Pentz has owned and operated Derby Farms, a full service training, boarding 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 Robert Dover, Steffen Peters, Inez Propfe-Credo and Jan Ebeling.

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 has competed thru Grand Prix and stands for breeding at Derby Farms.

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.

All images ©2017, Scarlett, Pentz, Brockman

Aubrey Adler - New Riding Assistant

Our new riding assistant Aubrey Adler has been with us since late summer of 2018. She is is wonderful with youngsters (horses and people). Aubrey has been riding since she was 4 years old. Over the years she has trained in a variety of disciplines including dressage, hunter/jumper, 3 day eventing, drill team, huntseat and western equitation and pleasure. She even dabbled in driving, gaming and vaulting. At age 8 her mom helped start a riding school in Redmond. Aubrey and her sister grew up caring for the horses and riding as much as possible. Soon they were riding with various other local trainers gaining skills and versatility on a wide variety of horses and ponies. Aubrey's somewhat eclectic background gives her a wide base of understanding that she brings to her training. Most recently she successfully brought a Welsh pony stallion along in the dressage and jumping arena. Her size and expertise is perfect for ponies and young horses. She is very skilled and has a superb seat. She will be helping to compete the youngsters here at Derby Farms while working her way up the medal ladder for the USDF. She has openings for young riders as well as adults and her teaching skills are tops. She can be reached by phone or text at 206-852-2411 to schedule lessons or training.


Katja Waldron - Former Riding Assistant

My wonderful riding assistant Katja Waldron has left us after a fantastic summer in 2018 earning her USDF Bronze and Silver Medals and is now in the Doctorate program in Psycology at Penn State. She is currently doing some part-time training and teaching in the Penn State Area of Pennsylvania. We wish her the best and hope to see her again soon!

All images ©2017, Pentz, B. Moore

Farrier Services

We have several Farriers who come to Derby Farms on a regular basis.Some very good with trimming of youngsters and others who specialize in shoeing the sporthorse. Contact Pam for more details.

Private Farrier

Clients at Derby Farms are more than welcome to use a farrier of their choice. There is no obligation to use the in-house farrier. Be advised if we must hold a horse or help with that farrier service we will charge a fee of $25.00 per hour.


Veterinarian Care

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 three 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. For more information on Rainland Farm check out their website.