Garden of the Gods  Located in Colorado Springs there a great viewpoint on the north end of the loop drive that gives you a perfect angle for photographing the series of sharp peaks that run along the center of the park.

Maroon Bells  Just a ten minute drive from downtown Aspen brings you to a lake at the foot of the mountains. One of the most scenic spots in Colorado, especially during the fall.

Crystal Mill  This old wooden mill on a cliff above the Crystal river is another iconic location in Colorado to photograph, again best in the fall when the aspen trees are changing color. You can pay a guide in Marble to transport you to it in a 4WD Jeep as regular passenger cars are unable to drive this rocky road or just hike the 11 mile round trip. 

https://www.smithfamilycolorado.com/CRJT/

Telluride Area  Arguably the best fall scenery is found in the Southwestern corner of the state. The Dallas Divide is a particularly nice stretch as it the area around Ouray.

Another good stretch of road is the Million Dollar Highway.

https://www.durango.org/discover-durango/the-san-juan-skyway/