Go and visit the city where we eloped if you have time. It's the perfect time to go look at the fall leaves in that area. The city has plenty of cute shops and restaurants to eat. Guanella Pass is on the way and also a perfect way to see the fall foliage.
One of our favorite sushi/date night spots. It's also the spot where we got engaged. If you go, get the salmon oshizushi and go during happy hour.