- It rains (and sometimes snows) a lot in Vancouver
- I have difficulty maintaining my desired pace outdoors
- It's a lot easier on my knee (I suffered from patello-femoral syndrome)
For my first half marathon, I almost exclusively trained indoors. But that was a mistake as my legs weren't ready for the pounding they took from running on a much harder surface. I'm wiser now and trying to mix things up and to get outside whenever the weather has been nice.