Originally Posted by
bkrownd
Never. Denver is road rage central.
Bicyclists in/around Denver are mostly posers and weekenders, not the type that will be on a bike to commute or run errands. Boulder is full of the "weekend athlete" sort that puts lots of miles on their AWD Subaru during the week, and pumps up their egos with ultramarathons on the weekend. I didn't encounter many people serious about utility cycling or bike commuting in either Denver or Boulder, taken as a fraction of the overall population. Sorry, but I gotta be brutally honest.
Nevertheless the old streetcar grid of East Denver around Park Hill was a great place to live if you want to bike everywhere. Boulder is a very mixed bag - the traffic jams and fast traffic make cycling around rush hour times a major headache if you aren't going somewhere that's on the established bike paths.
That's over stating it quite a bit. I've ridden here for 30 years and had very few run-ins with people in cars...both in them or on a bike. I've never had anything thrown at me and I wouldn't say that people are overly rude towards bikes.
There are a lot of noncommuters but then I see more bicycle commuters all the time (I've even commented it

). As a fraction of population, I'd say Denver...and Boulder...is probably about average when it comes to people bicycle commuting. Many more people commute to and in downtown then out in the suburbs but that's to be expected. With 3 colleges (and about 50,000 students) in the middle of town, you see a lot of bicycle traffic around there.
There is no organization of what bicycle commuters that exist here, however. I kind of see them as worms - you know they are there but you have to dig a lot to find them