If you have a particularly rambunctious pup, head for this hill. Barnum Dog Park is somewhat bare-bones, with pebble landscaping rather than grass that tends to wear out your dog sooner, and it's consistently clean. With a gated area for small dogs, you won't have to worry about any larger dogs backing yours into a corner. What we love most about this park, though, is its clear view of the Denver skyline. The nearby gazebos present a chill place to kick back, and if you're looking to get some human exercise, you can walk Fido down to the Barnum Park Lake Reservoir.