The marathon weekend will start next year Wednesday January 7th through Sunday January 11th.The expo will run Wednesday through Saturday with races every morning from Thursday through Sunday.The races probably bring in as many as 100,000 people with 60,000 running the races,with that said the crowds at the parks will not be bad at all.You have to realize these races require you getting up at 2-3am for races that will start between 5:30 and 6:30am,after the races runners may go back to their rooms to shower and change and maybe go to the parks for a couple of hours but will probably end up having an early dinner around 5-6pm to then go back to sleep to get up early the next morning.I only ran the full marathon on Sunday but I also got up early on Saturday to go see the half marathon and to change my body's clock so I could fall asleep early on Saturday before running the full on Sunday.To give you an idea of how little I spent in the parks in 3.5 days the only rides I rode were Soarin with FP+ and Test Track in singles,and I have an AP.The main issue would be traffic backups early in the morning on Saturday and Sunday for the full which goes through all the parks.