Always keep your winter coat in your car.
You can expect 40 degree temperature swings any day of the year.
The best day to go skiing/snowboarding is superbowl.
The best concert venue in the world is Red Rocks.
When you go, you still may need a hoodie in July.
The Mishawaka Amphitheater is great too. It's located up the Poudre.
It's still Fiddler's Green to me.
The best beer in the world isn't from Belgium, it's from Colorado. Colorado is ranked number one in terms of gross beer production and fourth in number of brewpubs and craft breweries in the United States, while Denver ranks first in beer production and second in number of breweries. We have New Belgium, Odell's, Great Divide, and so on and so on. Oh yeah, look at Stranahan's, our liquor distilling is getting up there too. (Here's the proof). Oh yeah, Coors.
Denver is one of few places in the country you'll see/smell someone smoking a bowl on the street. Also one of the few places where medical marijuana clinics outnumber McDonald's and Starbucks combined.
We have the nicest stadiums in the country between Pepsi Center for the Avalanche, Coors Field for the Rockies, and Mile High for the Broncos. Our teams are pretty badass too - you won't be able to find any Coloradoan who doesn't know the names John Elway, Champ Bailey, Joe Sakic, Patrick Roy, Todd Helton, and Troy Tulowitzki and hopefully Peyton Manning soon. The list goes on, so forgive me if I left someone out.
The only thing Colorado Springs is good for is Garden of the Gods, Cave of the Wings, and the Airforce Academy.
Trinidad has the most sex changes in the country.
If you're going to go out downtown, start at the 16th St. Mall. Red Square for infused vodka, Appaloosa for live music, and Rialto Cafe for inventive drinks and late night happy hour. Rock Bottom gives validation for parking at the garage beneath it, and has great bartenders in the back bar.
The Evil Blue Horse at DIA killed its maker (true) and will kill you too if you cross it (also true). It is the gardian of Colorado.
If you're broke and need a drink, go on a brew tour.
Greeley smells like manure, but I hear you get used to it (though I wouldn't want to). Due to prevailing winds, Fort Collins, and otherwise great town, occasionally smells like that too (usually Wednesdays).
Please feel free to post any I left out, there are many more!
Red Rocks