Yeah so I doubt there are many CO people on this forum, but I wanted to make a thread for the state anyway.
The main site we use to put together gatherings is
extrafresh.net.The majority of our current KoF players live in and around Denver, though there are a couple people in the north that come down to tournaments from time to time. Colorado Springs is pretty active too, but more for Marvel and not so much for KoF. As for tournaments: we have about 8 people including myself that show up regularly for KoF.
Leading up to EVO 2012, we had been holding weekly casual gatherings at a person's house to level each other up, and those went over really well so I think we'll be continuing that in the future. As for our skill level: 4 of our players went to EVO 2012 and 3 of them made it out of pools. We have some seriously strong talent here, despite having a pretty small player base - we're small but devoted! Hopefully we can get some more local people here interested, and I'll try to keep stuff here updated with tournaments and whatnot.