This trek should take you about 4 days, so it's a perfect thing if your backpack is big enough to do the job. The total elevation difference for Ainap Trail is 8,267 feet, and that is higher than average. Ainap Trail goes through some very different elevations, so keep in mind that you may need to dress differently at different elevations. With its 27.4 miles of walking distance; it's a long trail. This is a long great outdoors trail, so make sure you bring plenty of supplies. Ainap Trail has only one trailhead, so you're looking at an in and out backcountry hike.