We are headed to Colorado in late July, flying into and out of Denver. We'll be there six nights, arriving very early on the first day, and leaving late on the last day, so seven full days. I've already booked the first two nights in Estes Park, but the rest is open. The only two must do's are a bike ride in Glenwood Springs Canyon, and hiking the Maroon Bells in Aspen. Other things that look interesting are Colorado National Monument, Great Sand Dunes, Black Canyon of the Gunnison, seeing wildflowers near Crested Butte, and Ouray. I'm guessing that seeing all of this would be too much for the time that we have. We've previously been to Mesa Verde, Royal Gorge, and Colorado Springs, so we wouldn't include those in this trip. Any other suggestions would be welcome.
Also, I'm not sure of the best route to get from Estes Park to Glenwood Springs/Aspen. One route that looks interesting is going due south via 7/72/119, picking up 1-70 west, then exiting south towards Leadville so that we could drive Independence Pass to Aspen. Another option is to head west via Trail RIdge Road, towards Grand Lake and Kremmling, seeing the western part of RMNP, then picking up 1-70 west on to Glenwood Springs.
I've already posted in the Colorado forum, but wanted to get some more opinions. Thanks!