If you are staying in Denver before or after the wedding, there are plenty of places we recommend to eat. Some of our favorites are Tacos Tequila Whiskey, D Bar, or Highland Tap and Burger. Also, if you have the time, it's recommend to spend a night in Denver before heading to the mountains to get used to the altitude.
There are so many great things to do in Keystone. In the summer, the mountain serves as a mountain biking path. You can also rent stand-up paddle boards and kayaks at Keystone Lake. There are plenty of hikes in the area to enjoy all the great views.
Red Rocks is a concert venue you can't miss in Colorado. It is free to visit during the day or check out a show if you have the time.