Hi Janet! Welcome to the Disney Parks Moms Panel!
Not too much longer and you will be running your way through the
Walt Disney World Resort. How exciting! I really enjoy
runDisney events myself. There's just something so magical about racing at my favorite destination!
When it comes to the times of corrals, there isn't an exact schedule for when they release, but I can tell you that in the past it has been based on the amount of people in each corral. The first corrals usually have less runners than the last corrals, so the earlier ones are released closer together. With that said, I would approximate there to be 20-30 minutes between your release in Corral C and your niece's start in Corral H.
If you want to know exactly when your niece begins, you can always sign up for
Runner Tracking. This should send a text message alert to your phone when your niece begins, as well as when she crosses certain points throughout the race.
Enjoy your time at the
Disney Princess Half Marathon, Janet! Happy running!
Tabitha