The total elevation difference for Washboard Trail is 897 feet which is lower than average. This is a one trailhead hiking trail, so you'll be hiking it in and back out. You spend the whole trek in roughly the same elevation zone, so you get pretty much the same conditions along the whole backcountry hiking trail. At parts of the year this region sees very little rain, so do check for current fire restrictions before you go if you plan to bring a stove or make a camp fire. Now, this is roughly a 3-day hike, so it's a good thing if your backpack is big enough to do the job. This is a wilderness hiking trail that is quite long, so make sure you bring plenty of supplies. Being 20.6 miles long; it's a long backcountry hiking trail.