This backpacking and hiking trail has a total elevation difference of 3,844 feet which is a higher than average number. This neighborhood does get very dry sometimes, so donít forget to check for any current fire restrictions before you go. Humboldt Trail is quite long, so don't forget to pack enough supplies. Different parts of this backcountry trail are at very different elevations which of course means you need to be prepared for different conditions on different parts of the backcountry trail. Now, this is roughly a 6.5-day trek, so it's a glorious thing if your backpack is big enough to do the job. This backpacking and hiking trail has only one trailhead, so you'll be trekking it in and back out. Humboldt Trail is 43 miles long; it's considered a longer trek.