Hi, Barbara!
I hope you are getting excited for your upcoming vacation!
You are referring to
Disney's Princess Half Marathon Weekend. This is an annual princess themed race giving runners of all ages and abilities the opportunity to participate in a 5k, 10k, or half marathon. If this is something you may be interested in, registration for the Disney Royal Family 5k is still available. This event will be held Friday, February 21st, and will be a 3.1 mile run through the Epcot® theme park.
While the races will have photo opportunities with various princesses along the course, there won't necessarily be extra princesses in the parks. However, while you are in Magic Kingdom® I would love to suggest you visit the all new
Princess Fairytale Hall in New Fantasyland. This will be a great opportunity for your granddaughter to visit with some of her favorite princesses. Additionally, there are princess dining experiences available at Cinderella's Royal Table in Magic Kingdom® and at Akershus Royal Banquet Hall in Epcot®. Both dining establishments require advanced dining reservations that may be made online or by calling (407)-WDW-DINE.
I hope this information helps clear up any confusion, Barbara. Please do not hesitate to ask any additional questions you may have and I hope you have a wonderful time with your granddaughter at the Walt Disney World® Resort.
Have a magical vacation!
Faith