Take a Hike With These Trail-Blazing Apps (WSJ)

AllTrails Think of this as your essential trail guide. With an index of over 40,000 trails in North America, including an ever-expanding repository of route maps, AllTrails offers a comprehensive tool for getting yourself on the right track. Filter trails by location, activity and difficulty, and see the topographic map and reviews of fellow sightseers. Guides can be saved, in case you're venturing into an area with no coverage, and you can give your own rating after you're done. It's not the slickest app, but for its ease of use and wealth of information, AllTrails is a must whenever you're on the barely-beaten path. Free, available on iPhone. www.alltrails.com via online.wsj.com  

AllTrails

Think of this as your essential trail guide. With an index of over 40,000 trails in North America, including an ever-expanding repository of route maps, AllTrails offers a comprehensive tool for getting yourself on the right track. Filter trails by location, activity and difficulty, and see the topographic map and reviews of fellow sightseers. Guides can be saved, in case you're venturing into an area with no coverage, and you can give your own rating after you're done. It's not the slickest app, but for its ease of use and wealth of information, AllTrails is a must whenever you're on the barely-beaten path. Free, available on iPhone. www.alltrails.com