Hi, Jamie!
I am so excited you are planning on participating in the 2015 Disney Princess Half Marathon. This royal weekend truly is fit for a princess. I also have the feeling this won't be your last runDisney event, they really are addicting. And If you haven't already, don't forget to sign up for
runDisney Email Notifications. This is a free service and will keep you up to date on registration information and race details. With races selling out in record time, I wouldn't want you to miss out on your chance to get registered.
Unfortunately, Swarovski tiaras are not given out for the completion of four runDisney half marathon events -- though that would surely be amazing! However, there are opportunities in which you can receive an extra special "gift" as a runDisney participant. Those opportunities include being a legacy, or a "perfect" runner, meaning you have run every single race in a given race series. For example, those that have run all the Princess Half Marathon events are called Perfect Princesses and they receive extra gifts upon completion of each race. Other opportunities for special items include being a Coast-to-Coast runner, where a limited edition medal is given to those that run at least a half marathon at both Walt Disney World Resort and Disneyland Resort in the same calendar year. Also, when you participate in a race that is celebrating an anniversary (usually every five years), that year's medal will have a special design to commemorate. Race Challenge events also offer extra race medals, like the Glass Slipper medal given to those that complete the Glass Slipper Challenge of running the 10k and the half marathon during the Disney Princess Half Marathon Weekend.
I hope this helps clear up any confusion, Jamie! Please do not hesitate to ask me any additional questions you may have.
Happy Training!
Faith