This backcountry trail has only one trailhead, so in and out is the way to hike it normally. You should count on this trek taking about 5.5 hours, but of course some people walk a bit slower and some a bit faster. Even though this is not a very long great outdoors hiking trail you should still bring some emergency supplies just in case something happens. The total elevation difference for Mill Creek Trail is 972 feet which is a lower than average number. Being 6 miles long it's an average length backpacking and hiking trail. The backpacking and hiking trail stays roughly within the same elevation zone the whole time, so you won’t have to worry about different climate zones along your walk. This great outdoors hiking trail sometimes gets very dry, so do check for current fire restrictions before you go if you plan to bring a stove or make a camp fire.