Celebrate Earth Day: Trail Explorer App

For environmentalists, every day is Earth Day. Nevertheless, April 22 marks an occasion for extra reflection and celebration. This week, we'll show you how to make the most of the planet's party.

Tip #3: Map Your Favorite Place

So many trails, so little time to explore them. While we haven't figured out how to squeeze more hours into a day, we have developed a tool that'll store 40,000 trails in your pocket. The new Sierra Club Trail Explorer is a free iPhone app that allows hikers to quickly locate, document, and share trails. Plan your next adventure by searching for trails by name, activity, length, and location.

Read more: Find out how to weave old maps into a DIY basket.