Elkins out in Estes Park is pretty awesome. I try to stop by any time I'm in the area. I almost always have a bottle from them in my liquor cabinet.
edit: I should mention that they dropped me off a goodie bag at my home after I made an instagram post about my "alive day" that involved their whiskey. Decent folks there.
https://elkinsdistilling.com/
We just got a distillery here in Windsor as well. I've only had mixed drinks there so far (well, and a shot of absinthe). Might go in this weekend to do a flight and actually find out how good their liquor is.
https://theheartdistillery.com/
Feisty Spirits is another I enjoy. Unassuming little place in Fort Collins with a variety of liquors to choose from. I particularly enjoy their Red, White, and Blue whiskey.
https://theheartdistillery.com/