Fern Canyon Trail has a total elevation difference of 455 feet, and that is lower than average. Now this wilderness trail is pretty long, so make sure you bring plenty of supplies. Of course, this is an overnight walk, 2 days normally, so make sure you've got all your overnight gear packed. Sometimes this wilderness trail gets really dry, so make sure you check current conditions and fire restrictions with local forest authorities before you head out. This hiking trail has only one trailhead, so you're looking at an in and out walk. Fern Canyon Trail stays roughly within the same elevation zone the whole time which means the conditions are about the same from start to finish. Being 13 miles long; it's longer than many backpacking trails.