I’ve been working on an iPhone app that we’re calling something creative like HikeSuperstitionMountain. This application will provide users with pre-mapped trails that they can follow on their iPhones, using Core Location to provide location via the GPS chip.
Currently I have the application using route-me, an open source mapping project designed to provide map data, currently from OpenStreetMap project. We may change to another source before submitting to the AppStore, as the Open Street Maps data does not include the wilderness area.
I am also currently showing the trailheads on the map, which you can see in the image I’ve linked to below: