Very for the most part, and for what it is hah
-For one you have Denver Fury, a D1 team (in PSP and D2 in NPPL?? Please correct me guys). They play at Blitz and Total Adrenaline.
-Colorado Villain - Fury's lower divisional team - D3
-Mile High Saints - not as high up as the Fury boys but they've participated in a handful of national events and done very well and they have a somewhat long legacy in Colorado

They also play at Blitz but during the winter you can find them at APC (indoor) in Denver.
-Colorado Blitz - can't forget those guys!!! Blitz's home team!
-Sundays during the season Blitz draws a great crowd of teams that I did not mention as well, these are just a few..
I haven't checked out Dynamic (Denver) in a while. I want to say they still run an airball field down there?? A handful of teams there as well that have had a long ride in Colorado ie Sin, Ascent.. (Again, correct me if I'm wrong. I'm rusty and uninformed).
There are other fields around but it'll stray from your question.. Mentioning Blitz is probably bad taste due to it not being
in Denver haha I'm slightly biased because I love Blitz >_>
-edited! Thank you. I've just been messin' up all over the place lately..!