This one I got a cheap entry for and wasn't big on my schedule, but was a pretty uplifting event and started December off right! This one took place entirely within Denver's City Park, with benefits and limitations in tow.
Pros: Decent parking if you get there early, very festive race-day expo, post-run christmas cookies, lots of good vibes
Cons: the course had a lot of ice and the park statutes forbid sand or salt (caution was needed), a large number of "green" or non-runners clogging the path (two abreast at most pls!), a little awkward if one is not of Christian faith, too much Mariah Carey holiday refrains (you know which one...)
That said, I PR'd despite the ice patches, and I saw at least one rabbi costume, which was greeted with jovial inclusion. Everyone was clearly having a great time, myself included!