Gotta agree with the folks above, regarding the Peak to Peak, with one minor caveat...
Having recently driven CO 7 from Estes Park to Allenspark, it is in terrible condition. It's been quite neglected by CDOT. There's quite a bit of buckled pavement, pavement broken at the shoulders in places, and potholes. The worst part is from Lily Lake to the Larimer/Boulder line by Charle EaglePlume's Art Gallery. A bit better in Boulder County up to Meeker Park and Allenspark. You'll appreciate CO 72 when you turn off CO 7.
That said, I would NOT discourage taking this route. Just use extra caution and reduced speed in the areas mentioned.
Also, when coming in to Nederland, there's a roundabout that can be a bit of a challenge, only because of traffic volume coming up CO 119 from Boulder. Folks in the roundabout have the right of way, so trying to merge/right turn to CO 119 to Black Hawk can take several minutes of patience until there's a break in the traffic. In town can be a zoo on weekends.
