This is a one trailhead backpacking and hiking trail, so in and out is the way to walk it normally. Sometimes this hiking trail gets really dry, so donít forget to check for any current fire restrictions before you go. Some parts of this trail are much higher up than other parts of the trail, and that means that some parts of the trail could be very different from other parts of it. This backcountry hike should take you about 4 days, so make sure you've got all your overnight gear packed. Alder Trail has a total elevation difference of 4,382 feet which is higher than average. With its 26.2 miles of walking distance; it's considered a longer backcountry hike. This is a long hiking trail, so make sure you bring plenty of supplies.