top of page

Our Team


Sarah Lockman

Sarah Lockman has been riding horses since before she could walk on her own two feet. She is a graduate B Pony Clubber and competed through the Intermediate level in eventing, impressively finishing third at her first CCI*** when she was just 15 years old.

In 2004, Sarah shifted her focus, solely training and competing in dressage. She regularly participates in many different clinics and rides with top trainers including Judy Harvey, Bert Rutten, Debbie McDonald, and Guenter Seidel.


Sarah has taught many riders and horses from Training level all the way to Grand Prix. In 2016 she had over 15 pairs of horse and rider combinations qualified for CDS/USDF Championships. For many years she had a large amateur client base and the largest sales program in Southern California. In 2018, Sarah was offered a prestigious lead rider position at Summit Farm in Murrieta, California.


No longer managing a large business of amateur clients, she is able to dedicate her time to her competition mounts exclusively representing Summit Farm. 


Sarah is currently coached by Scott Hassler and has a string of competition mounts, including her newest FEI partner, Summit Farm's First Apple. First Apple and Sarah broke out the 2019 season with an impressive 78% at the I-1 just one month into their partnership. 


In 2019 Sarah Lockman and Summit Farm's First Apple joined the United States Equestrian Team at the Pan Am Games in Lima, Peru besting their own high score with a 74.853% at the small tour. They won an individual gold medal and a team silver medal. 

Cassie and Selene.jpeg

Cassie Frost

Cassie Frost started riding at 14 and competed in her first “A” rated show at 15, and jumped her first Grand Prix at 19.


As she developed as a rider, George Meyer, along with his wife Gail Ross, took her under their wing. While working with them, Cassie helped develop, compete, and sell 80+ horses imported from Europe.


She considers herself lucky to have Kathy Kusner take an interest in her career as well and has benefited from her coaching. 

Throughout her career, Cassie has specialized in developing young horses, bringing horses from young jumpers all the way to the Grand Prix level and has started some very successful hunters. 

At 25, she started her own riding business in Enterprise, Alabama after getting married to an Army pilot. As his career moved their family, she established a second business in Clarksville, Tennessee. 

Cassie has coached successful riders from high school equestrian teams to individual hunters jumpers and equitation riders. She coached and trained the horse and rider who won reserve championship in the prestigious CPHA amateur Medal Finals in 2017.

Cassie focuses her competition and sales horse programs on quality rather than quantity - preferring to develop and compete carefully imported horses to perform at the top of their respective disciplines.


Octavio Rocha, Groom

Octavio began grooming horses 28 years ago in 1992. He has spent the past 10+ years working for Sarah Lockman and joined the Summit Farm family in 2018.

Previously, Octavio worked for two jumper trainers including multiple World Cup finalist Richard Spooner. Octavio has groomed at prestigious events including CDS State and USDF Regional Championships and has traveled to groom for Summit Farm at the USEF National Championships in Chicago as well as the 2019 Pan American Games in Lima, Peru.

He is caring and patient with the horses and is particularly skilled in working with young horses and stallions. Octavio’s strong work ethic, kindness, dedication and attention to detail make him a strong asset to Summit Farm and, most importantly, the team and horses love him!

bottom of page