No, not any more. Disney used to have a 10 & 13 k in October as part of the Fall Endurance series. But they cancelled them to do the new "Wine and Dine" half marathon in October. They do have a 5k challenge in June called the "Everest Challenge". It is a blast, the total distance traveled be me and my partner was just over 6 miles. There are usually 5K's run during the other half and full marathon weekends. Check out this link -
Well, they are doing a 1/2 marathon relay as part of the Wine and Dine 1/2. Not a perfect 1/4 marathon, but if you have someone to do the split with its pretty close. And as Frank said, they have 5k's at most of the events now.