Okay, but not great
I used this in Rocky Mountain national park for the first time last week. It worked fairly well, but there were 3 challenges I had: 1) The inability to search. You have to scroll and seek places on the map yourself. For example, you cannot just search "Haynach Campground." You have to keep tapping campgrounds around the area you think it is to find it. 2) When you zoom in close, you lose resolution. To get clear image and topography, you have to zoom out, which is sometimes inconvenient. 3. One campground was inaccurately located on the map. The REI app said we had passed the campsite, but we had not reached it yet (Sunset Campground). This really confused us when trying to locate our campsite. Not sure how many examples there are of that.
Paul8757$88 about
National Park Trail Guide, v3.0.3