Head out on this 6.7-mile loop trail near Centennial, Colorado. Generally considered an easy route, it takes an average of 2 h 3 min to complete. This is a very popular area for birding, fishing, and paddle sports, so you'll likely encounter other people while exploring. The trail is open year-round and is beautiful to visit anytime. You'll need to leave pups at home — dogs aren't allowed on this trail.