There is only one trailhead, so you're looking at an in and out trek. This great outdoors hiking trail has a total elevation difference of 1,206 feet which is about average. Now, this is roughly a 2-day backcountry walk, so it's an outstanding thing if your backpack is big enough to do the job. Pass Trail is 11.8 miles long; it's longer than many trails. Pass Trail is quite long, so make sure you bring plenty of supplies. There's not much difference in elevation along the trail which means the conditions are about the same from start to finish.