Explore the famous Red Rocks Park - a short 20 minute drive from Denver to Morrison will get you here. You can climb the stairs and see a great view of Denver or hike on one of the various trails in the area! Red Rocks is a great venue for concerts as well! Goo Goo Dolls play 7/27 if you are looking for a fun pre-wedding night activity.
Dillon and Steph spend a LOT of time in the summer at the park. This park has two lakes, two formal flower gardens, tree-lined paths, tennis courts, basketball courts, and seemingly endless expanses of green grass. There are always lots of people playing volleyball, riding their bikes, running, walking their dogs, or paddle boarding. A great place to just hang out outside!
If you are looking to spend time near the city, Rino Art District has tons of fun bars and restaurants. Steph & Dil would recommend Number 38 for live music, Ironton Distillery, Improper City or BlueMoon Brewery.