Gilbert H. Grosvenor, National Geographic magazine’s founding editor, is credited with saying: A map is the greatest of all epic poems. Its lines and colors show the realization of great dreams.

Brush up on your knowledge of Yellowstone's geography with this interactive version of National Geographic's Trails Illustrated map Yellowstone National Park MapPlanning a Yellowstone trip?

AllTrails is one of the most highly rated hiking apps available to any outdoor adventurer. This app uses a format that allows users to gain insight about certain trail ...

[Doug / Doug Engle / USA TODAY NETWORK For some, hiking season has ... navigate over to the National Geographic site. Here, NatGeo sells physical copies of trail maps based on the National Park.