Twin Sisters Trail is a one trailhead backcountry hiking trail, so in and out is the way to backcountry walk it normally. This backcountry hiking trail has a total elevation difference of 1,307 feet, and that is about average. The wilderness trail stays roughly within the same elevation zone the whole time which means the conditions are about the same from start to finish. You should count on this hike taking about 6.5 hours, but you never know stuff could go wrong and you could get stuck so be prepared for that. Now this hiking trail is pretty long, so make sure you bring plenty of supplies. Twin Sisters Trail is 7.4 miles long it's an average length wilderness trail.