There is only one trailhead, so you'll be backpacking it in and back out. You spend the whole backcountry walk in roughly the same elevation zone, so you get pretty much the same conditions along the whole hiking and backpacking trail. Even though this is not a very long wilderness hiking trail you should still bring some emergency supplies just in case something happens. This wilderness hiking trail sometimes gets very dry, so make sure you check current conditions and fire restrictions with local forest authorities before you head out. The total elevation difference for Sun Rock Trail is 419 feet which is lower than average. You should count on this backcountry hike taking about 3.5 hours, but of course some folks walk a bit slower and some a bit faster. Sun Rock Trail is 4 miles long it's an average length hiking and backpacking trail.