Yup, had that happen to me one year!
Stayed at BLT last year, and while it was definitely convenient before the race, after the race I really wished I was taking one of the buses because the walk to those from the finish line was a LOT shorter than the walk to the monorail. Plus then had to go up and down the ramp at the TTC. So keep that in mind - after 26.2 miles, even a little bit of extra walking can be a chore...