Boulder Trail has only one trailhead, so you're looking at an in and out trek. With its 13.6 miles of walking distance; it's longer than many hiking and backpacking trails. The hiking and backpacking trail stays roughly within the same elevation zone the whole time, so you wonít have to worry about different climate zones along your backcountry trek. This area does get very dry sometimes, so donít forget to check for any current fire restrictions before you go. Boulder Trail has a total elevation difference of 659 feet, and that is lower than average. This is a long backpacking and hiking trail, so do pack enough food to last the whole trip. This backcountry walk should take you about 2 days, so better have big a backpack to fit all the stuff you need.