There is only one trailhead, so in and out is the way to backcountry walk it normally. This great outdoors hiking trail sometimes gets very dry, so make sure you check current conditions and fire restrictions with local forest authorities before you head out. You should count on this backcountry walk taking about 7 hours, but of course some folks walk a bit slower and some a bit faster. Some parts of South Fork Trail are much higher up than other parts of the hiking and backpacking trail, and that means that some parts of the hiking and backpacking trail could be very different from other parts of it. South Fork Trail is 7.8 miles long it's an average length hiking and backpacking trail. Now this great outdoors hiking trail is pretty long, so make sure you bring plenty of supplies. South Fork Trail has a total elevation difference of 1,563 feet which is about average.