It seems like a terrible idea.
The course was set up between the Parliament buildings and the Chateau Laurier. The events started at 6; we got there around 5:45. We tried a couple of locations but ended up behind the Bytown Museum. There were tons of people there, but it was cold.
The first race didn't start until around 6:15, and then there was a long wait until the next one around 6:30. After that, they were close together, so we watched a few before I got cold enough that I wanted to leave.