The Owners
Margi and Norm Castiglione have extensive experience with thoroughbreds and are the proud owners Prima Showjumpers and Riversedge Racing Stables in Okotoks, Alberta.
Margi's love for horses is second to none and Norm's great business sense and personality form the foundation that Prima Showjumpers stands on, that and a long history of top rated horses for showjumping and breeding.
The Horses
Over the years our stables have been blessed with many remarkable, world class showjumping horses. We've trained and competed, raised a new generation of outstanding horses and have helped young riders to to achieve success in their riding careers.
Scroll down to meet one of our young riders and an even younger new filly with a terrific pedigree and great potential.
Please visit our 'The Stables' page to see more of the wonderful horses that have spent time at the Prima Showjumping Stables.
Our Newest Filly
We haven't completely decided on a name yet- standing beside her mom Carmelita, is sired by Picobello. She is a pretty little girl who likes to romp outdoors on the grasslands of the Prima Showjumpers pastures.
UR My Fortress
This is another of the youngsters at the Prima Showjumping Stables. Sired by Fort Knox, her registered name is UR My Fortress. We call her Tress!
Supporting Young Riders On Their
'Showjumping Journey"
Amanda
Amanda is a talented young rider and a key competitive show jumper on the Prima Show Jumpers team.
For the past five years, Amanda has honed her skills riding some of the talented horses owned by Margi. It's a foundational partnership that has contributed significantly to her equestrian journey.
Amanda recently achieved a notable placing in the 1.40m class at the Rocky Mountain Show Jumping grounds, a testament to her dedication and the quality of her training.
As a dedicated rider for Prima Show Jumpers, she is benefiting from the expert coaching of the esteemed Sergey Zayika. Committed to excellence and consistent performance, Amanda represents the high standards of Prima Show Jumpers in the arena.
Prima Showjumpers supports her journey as she continues to push boundaries and achieve new heights.
This is a video of Amanda at a recent competition at Rocky Mountain Showjumping in 2025.
Competing at Spruce Meadows