Here's the CNC page about previous years' results:
https://www.citynaturechallenge.org/past-results
It's worth a look to see just how world-wide an effort the CNC really is. What a wide range of participation in each CNC there is!
According to the Cities list released by the CNC to its organizers, 492 cities have been organized worldwide! So participation continues to grow each year. I don't know if I'm permitted to share the actual google doc spreadsheet, so I won't. However, if you known folks who don't live around here but would like to partricipate in their own area, reply here or message me and I'll copy/paste the spreadsheet line that contains the info they'll need to find their local Challenge.
Our own Bioblitz has grown to 73 folks who've joined. Again, please spread the word amongst your freinds, your social media, and message the folks you "follow" in iNaturalist, even!