Awesome app! – Tom Harrison: Mammoth High Country Review

Used this (along with the paper map) on a 35 mile loop out of duck pass. It flawlessly pinpointed my location all but one time. It seems to have "Island Crossing" on Fish Creek Trail located in the wrong spot. I almost crossed on a log when up ahead about .25 mi there was a bridge. Other than that mishap it was so great to know exactly where I was on my hike.
Review by Ocsjones on Tom Harrison: Mammoth High Country.