Im not a runner but friends of ours have been really getting into the Disney marathon life. They are locals and have been running them all. ( Expensive ) They have been getting widely popular and been a big draw, some particular marathons more than others, but theyve all really caught on. The resorts get slammed with runners and their families. The parks have seen a bit of an increase after the races, but not as bad as youd think. There is some overflow a couple of days after events. A lot of guests are in for the event and out soon after.