I know of and have flown at 2 when I was in Denver for vacation. There is a public field at Chatfield State Park, you can even see the runway on google maps, and one in Arvada next to the Rocky Mountain arsenal, but it is club managed. I got permission to fly at that one. It's the Arvada Associated Modelers.
Also Colpar hobbies and crafts on South Wadsworth and Thompson hobbies at 15th and Wadsworth will have more info, they deal in RC. You will like both for your hobby needs.
Last edited by hookedonrc; 11-28-2013 at 06:00 AM.