Mackenzie Thorpe is one of my favorite artists. He visits Denver occasionally.
You are looking for a camo pill bottle (not an ammo can any longer.) The old container used to hold Mackenzie Thorpe pictures, but the cache was stolen, so you'll need to explore Mackenzie Thorpe's art via the link on this cache page.
Suggestion: Use Google Maps' satellite view to plan your approach. The terrain will be more difficult than two stars if you approach this cache from the southwest. There's a relatively easy trail near the lake shore that will bring you toward this cache, keeping you away from the swamp to the southwest of this cache.