Detailed trail info app. Excellent. – AllTrails: Hike, Bike & Run Review

AllTrails offers lots of useful info on trails, including helpful user reviews, tracks, photos, maps, elevation charts, directions to trailheads, and more. The pro version allows you to print maps or download for offline use, great when you're out of cell tower range.
Review by dtclarinet on AllTrails: Hike, Bike & Run.