Different parts of this great outdoors hiking trail are at very different elevations, and that means that some parts of the great outdoors hiking trail could be very different from other parts of it. This is a wilderness trail that is quite long, so don't forget to pack enough supplies. You should count on this walk taking about 9 hours, but you never know stuff could go wrong and you could get stuck so be prepared for that. Eagle Tanner Trail is a one trailhead wilderness hiking trail, so in and out is the way to backcountry trek it normally. Being 10.4 miles long; it's longer than many great outdoors hiking trails. This wilderness hiking trail has a total elevation difference of 2,700 feet which is higher than average.