In Connect Web, there are a lot of categories you can use to mark activities: the overall type (Uncategorized, Running, Indoor Running, Obstacle Running, Cycling, Gym and Fitness, etc.), and Event Type (Uncategorized, Geocaching, Race, Recreational, etc).
I dutifully organized all of these for all of my old activities when I transferred to Garmin, but under Activities / All Activities / Search, I can't use any of these fields to search. In fact, I have to include the text "_race" to be able to just show me all of my races. I can't even use "#race" because the search function ignores the # symbol.
It would be better if there was a more direct way to limit search results to particular categories if so desired.