This is an awesome walk that I highly recommend doing in Denver. It's nice because it's for people of all ages... dog friendly... stroller and kid friendly... and great if you don't want to hike, but still want to enjoy the mountain view.
It's a 6 mile total hike there and back, but you can stop at any time and turn around if you're wanting a shorter walk. It is completely flat and paved, except for areas where you want to go down to the creek. We loved it!