From the official site:
Race through the galaxy on a course of your choosing during the Star Wars Virtual Half Marathon! Whether you break up your 13.1 miles over multiple days or rack up the mileage all at once, runners will earn a one-of-a-kind, Star Wars-themed medal for their accomplishment. Don't miss out on this Star Wars adventure like no other.
Runners can sign up starting August 28th on the runDisney website
through March 30th, 2019 and you'll have from January 3rd - March 31st to complete the distance.
Just like this year, you'll also have the option of signing up for the Kessel Run Challenge where you'll run both the Virtual Star Wars
Half Marathon & the newly renamed Star Wars
Rival Run Half Marathon to claim the coveted Millennium Falcon medal! Be sure to mark your calendars and start training now so you can complete the distance when the time comes.