Hi Stefanie!
Great question! RunDisney is still finalizing all the details for this year's race, but they will probably be very similar to last year's. I am giving you the information from last year. Also, if you keep an eye on
The Twilight Zone Tower of Terror Ten-Miler website, you will find all of this information posted closer to race weekend. It will be under the tab "RUNNER INFO".
Parking at the ESPN Wide World of Sports is free. You will need to be there in enough time to get on a shuttle bus by 8 p.m. The bus will take you to Hollywood Studios for the start. I would plan to get there no later than 7 p.m., as the lines will start forming and you don't want to be late.
There may be some road closures around the area. In the Final Race Instructions booklet, it will give you exact directions to deal with any road issues. The race instructions booklet can be downloaded from the website and will also be available in print form at the expo.
I hope this helps! Please let me know if you have any other questions.