Please consider implementing a method for runners to designate an event as serious or fun. Fun events won’t impact a runners percentile or time estimates while races flagged as serious will. Serious runners may wish to “take it easy” on some events to run with friends or just enjoy views without worrying about their rank changing.

I’m not one that cares about this sort of thing, but if it were to be implemented, I would suggest making it non-retroactive. The runner would have to declare the race as a “fun” or serious” race before race day. That way runners couldn’t just mark every poor performance as “fun” to increase their rank