Take a look at Daniel's Park. The view is beautiful and they have a picnic area. You could have a catered bar-b-q. Look at parks such as Washington Park. Depending on where you are. There's some beautiful places within the Jefferson Country Open Spaces as well. Hope this helps. You could even do something at the Botanical Gardens. This picture will give you an idea of the view. YOu can see the mountains from Pikes Peak to Longs Peak.