Sarah Whitney is a tall, 12 year old girl. She has bright blue eyes and wavy buttery blonde hair. She has a lighter colored bang that is pushed to the left side of her face, and three other light colored stripes.
Sarah Whitney is the owner and rider of a black Arabian horse named Scarlet, who has red highlights in her hair. Because of this, Sarah has a red/black themed riding clothing to match scarlet. Her casual outfit consists of a long sleeved, red V-neck jacket with a white shirt turtle neck shirt under it with black collar. She has black riding boots that go up to just under her knees. Her riding helmet is black.
When Sarah rides in a competition, she wears the same outfit, but she puts her hair in a ponytail, likely to keep it out of her face.
In the episode, "The Competition" Sarah gets a Western riding outfit. She wore a cowboy hat over her helmet. The hat had a red band and a golden oval in the middle of her hat that holds white feathers. She has a long sleeved, turtle neck shirt with another golden oval on her neck. She wears a black vest over it with a row of feathers at the bottom. She has long white pants and black knee high boots.
In the episode "Fire, Fire Burning Bright" Sarah is seen her pajamas. She wears a black tanktop with a white shirt over it, and long red pants.
Sarah is an overall kind person and loves to make friends. Being the daughter of the two richest people in the state, most people just assume she would be a snobbish brat, much like the two already at Horseland; Chloe and Zoey. But Sarah is selfless, determined and friendly. She firmly believes that "clothes and clothes" and they are to be held at a lesser value than friendship, which earns her no love from Chloe and Zoey.
She is very good with horses and seems to be able to somewhat understand them at a minor level. Her horse is Scarlet, whom she has been with since she was young. She has a very good relationship with Scarlet and takes great care of her, and is a very good rider. However, she sometimes overestimates Scarlet's abilities and overworks her, especially when she is determined to learn a new jump or a new move. She is very loyal to Scarlet, and refuses to ride other horses, saying that "It just doesn't feel right."
Sarah is always trying to be the best she can, and earned the nickname, "The Can-Do Kid" because of it. She tries to get the best out of her friends as well and help them learn from their mistakes. She is endlessly patient and encouraging, and always tries to make everyone happy and can become frustrated when others are being mean or unreasonable, which makes it hard for her to get along with Chloe and Zoey.
She is very good friends with Bailey, Alma, Molly and Will. She is always kind to them, but she can be very competitive, and can be lost in her desire to win, which may prompt her to say things she doesn't mean, as seen in the episode "The Competition."