Silver King Trail has only one trailhead, so in and out is the way to walk it normally. This trail sometimes gets very dry, so donít forget to check for any current fire restrictions before you go. Now, this is roughly a 3.5-day backcountry walk, so it's a magnificent thing if your backpack is big enough to do the job. Silver King Trail has a total elevation difference of 1,976 feet which is an average number. Silver King Trail is quite long, so don't forget to pack enough supplies. Being 23.6 miles long; it's considered a longer backcountry trek. This wilderness trail goes through some very different elevations which of course means you need to be prepared for different conditions on different parts of the wilderness trail.