If you are a hardcore runner and haven’t heard of this somewhat informal tradition yet – it has tended to fly below the radar, but this year we’ve received multiple requests for a mention (and it even has a Facebook page), so here goes: This Sunday, before the Super Bowl, dozens of people will be running either 25K or 50K, starting at 8 am at the south end of Lincoln Park. It’s not a race – in fact, the website describes it as “a no fee, no shirt, no aid, no whining type event” – but registration is suggested, and you can do that here.