Colin Fletcher was a pioneering backpacker and writer.

In 1963, Fletcher became the first to walk the length of Grand Canyon entirely within the rim of the canyon "in one go" — only second to complete the entire journey — as chronicled in his bestselling 1968 memoir The Man Who Walked Through Time. Through his influential hiker's guide, The Complete Walker, published the same year, he became a kind of "spiritual godfather" of the wilderness backpacking movement. Through successive editions, this book became the definitive work on the topic, and was christened "the Hiker's Bible" by Field and Stream magazine.